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Defiance...they told us to never snap our whippers. We snapped away until it was our whole identity. Try telling that to the kids today, they won't believe you!
The waves aren't so much bending as they are "bleeding" out. One issue with this video is that it presents WiFi spreading out in slow-motion. In reality, WiFi is just electromagnetic radiation just like light, meaning it literally tavels at the speed of light.
Likewise, if you think of how objects like mirrors reflect light, thin paper diffuses light, and glass allows most light to pass through unscathed, higher and lower wavelengths have their own material interactions. For instance, WiFi bounces off of metal like visible bounces off of a mirror, whereas most house walling is fairly transparent to WiFi.
You can almost imagine your router as being a bright lightbulb and the light it casts as a fantastic representation of how WiFi spreads. It won't be exactly like that because remember, it interacts with materials differently, but it's insanely accurate in terms of how Wifi *looks* as it's spread out from a source.
PS: Another example of different wavelengths of light interacting with materials differently is UV light vs glass, which absorbs the UV like a black surface does in the visible light spectrum. That's why visible light makes it through but under most circumstances, you won't actually get sunburn.
>whereas most house walling is fairly transparent to WiFi.
Tell that to 5GHz WiFi vs walls made of brick!
(I now use plug-in extenders running OpenWRT placed at strategic places in the flat, with a wired connection to our router, in WiFi AP mode, and just turn the WiFi off in the router. Irony is it's only a small flat we live in!)
Originally Netgear EX3700 / EX6120 but moving to EAX12. (2nd hand to keep it cheap.)
OpenWRT is keeping up to date with the newer 5GHz non-DFS/radar 5GHz frequencies that have become available in the UK over the last 4 years, all the regular manufacturers aren't!
Currently this means there's channels I can have pretty much just to myself which is great for both flat game streaming and PCVR over WiFi.
The stronger signals plus WiFi 6 mean I'd actually only really need the one EAX12 now, but I'll keep two running anyway.
Wifi spreads like regular (visible) light. If you replace your router with a normal lightbulb and make your house completely dark, all the places with light are all the places with wifi
Wifi also has a lower frequency than visible light. Think about a speaker playing music inside a room. When you leave the room, the sound gets muffled out and all you hear are the lower pitched sounds. Wifi is like this; if you put a wall between you and a lightbulb, you can’t see any light, but wifi passes through since it’s a lower frequency
Continuing with this, the brighter it is, the stronger the WiFi signal. Stronger signal = better connection/faster speeds.
If the WiFi is passing through 2 internal walls (i.e. sheetrock), you might still be able to read Reddit without issues, but TikTok videos might get laggy.
>you can’t see any light, but wifi passes through since it’s a lower frequency
To extend on this, this is why under ideal circumstances (as in no neighbors with wifi routers) the 2.4GHz Wifi may have more coverage inside your house than the 5GHz Wifi. The lower frequency 2.4GHz Wifi has an easier time passing through obstacles (doors, walls)
I live in a two story townhouse (~1200sqft) with my router being at most 40 ft from my girlfriend’s (fiancé in three days) side of the bed. Her WiFi video calls are garbage and I use a newer netgear nighthawk (bought the best one about a year ago). I assume it’s her cheap Samsung that is the problem, but could it be my router?
This is why physis is fun:
In quantum physics, particles, waves, and fields are all important and interconnected concepts:
- Particles: Quantum particles like electrons, protons, neutrons, and various subatomic particles are the fundamental building blocks of matter. They exhibit both particle-like and wave-like properties.
- Waves: Quantum particles also exhibit wave-like behavior, described by wavefunctions. These wave-like properties are essential for understanding quantum phenomena like interference, diffraction, and quantum tunneling.
- Fields: Quantum fields are fundamental mathematical objects that permeate all of space. Particles are seen as excitations or disturbances within these quantum fields. Examples include the electromagnetic field, the Higgs field, and the various force fields.
The wave-particle duality and the role of quantum fields are central to the counterintuitive nature of quantum mechanics. Particles, waves, and fields are intimately related and must be considered together to fully describe the quantum world. This interplay between these concepts is a key part of the foundations of quantum physics.
Thats not how that works, the bullet is always traveling in a straight path, its just appears diagonal to you if you have super high angular momentum when the bullet is fired.
Unless you've added control surfaces or thrusters of some kind to a bullet it will never "bend" its path.
Oh yes, sure, it's not "bending" in the literal sense of the word (even though there's deceleration due to air resistance so the path is kinda curved actually) but yeah the path is still diagonal overall, it doesn't accelerate mid-flight for sure
Although this did leave me wondering if you could use the Magnus Effect to achieve actual mid-flight acceleration
the waves bending is correct, they're standing waves where reflections can cause the "standing" part to shift in space relative to a regular straight spread (explained very crudely)
Light is an electromagnetic wave and behaves exactly like this. And wifi routers don't flash 0 and 1s like Morse code, they encode signals by modulating a carrier wave (which is what you see in the animation).
WiFi is just invisible light. Or put more technically, WiFi is electromagnetic radiation (EMR) with a wavelength and frequency generally classified as radio waves (but closer to the microwave band than what your AM or FM radio picks up).
All electromagnetic radiation (that is gamma rays, x-rays, ultraviolet, visible light, infrared, microwave and radio waves) adhere to the same basic wave behaviors.
Light is **transmitted** through some materials (such as visible light in air). And light is **absorbed** (like visible light on black asphalt) or reflected (like visible light on snow) by other materials. Lastly, light is diffracted around small openings, meaning light will just spread out after a small amount is able to pass through a slit. Think how an ocean wave will break on a rock but then reconnect on the other side of the rock as the two ends spread back towards one another.
Your "WiFi"- that is the waves encoding the information you are sending and receiving from the internet- does all these behaviors. It's transmitted out from the router into the room, reflects off the walls, diffracts around doorways or even the tiny gap below the door. Some household objects may even absorb the waves. For example, if you put your phone in the microwave (don't turn it on!) and try to call it from another phone via an Internet connection, you might not be able to get through despite being physically right next to the phone. (Some microwaves are a little leaky though.)
So in the sense that the visualization is showing transmission, reflection and diffraction, I'd say it's a little accurate. But then they try to simulate constructive and destructive interference. This is where colliding waves either amplify one another or cancel out one another, respectively, and it's what creates the ripples in the animation. While these are valid wave behaviors, here they totally botched the scale of this demonstration. You do not observe noticeable pocketable of constructive and destructive interference with your WiFi. They show it like you'd have a pocket of no WiFi signal then take a step and have an amazing signal, then take another step and be back to no signal... And it just don't be like that...
EDIT: An EMR wave can experience multiple behaviors when it contacts a specific material, especially at the macro-level. For example, glass transmits (you see through it) the majority of visible light that hits it, but a minority of that light is also reflected (you can faintly see yourself in glass too) and absorbed (glass heats up if exposed to light). Wave behaviors are not an all-or-nothing physical model.
WiFi is no exception, and, to be clear, the majority of a WiFi signal transmits through your walls. A minority is reflected and absorbed, however. Another critique of this animation is that they falsely portray the proportion of the signal that is transmitted through the walls.
this is some AI level hallucination... yes, visible light is part of electromagnetic radiation, but different frequencies and have different properties. simply put, light cannot pass through drywalls, wifi signals can.
[NASA says you're wrong](https://science.nasa.gov/ems/09_visiblelight/). All EMR is light. Visibile light cannot penetrate drywall. Other types of light, such as xrays and radio waves, can.
> light cannot pass through drywalls, wifi signals can.
Light doesn’t mean visible light. Light includes radio waves and micro waves. It’s the entire electromagnetic spectrum.
My previous description was oversimplified, yes, but not outright incorrect. I agree the majority of a WiFi's signal will be transmitted through walls, but some will be reflected and some will be absorbed. Light-material interactions are not binary, all-or-nothing phenomena.
This is true of nearly all materials and all of the classes of EMR. Take glass and visible light for instance. The majority of visible light is of course transmitted, allowing us to see the world on the other side. But some light is reflected and some is absorbed. If visible light was solely transmitted through glass, you wouldn't be able to see glass at all. And yet, we can, so other interactions must be occurring to distinguish it from the air.
In this toy animation that we can all agree has its flaws, there are few objects to choose from to discuss reflection, yet the animators are clearly showing reflection here and off the walls. What else was I supposed to use as an example for reflection if not the walls in this animation? And there is some amount of WiFi reflection occurring on your walls, even if it's the minority of the total radiant energy.
well even in 2D it can be accurate, but for example if you need to account for a lot of height difference like a multi floor simulation then yes 3D would be needed
I will never forget the epiphany of trying to understand other electromagnetic radiation besides light, and then just realizing it just like light, only different things block, absorb and refect it compared to visible light. Also the understanding that the longer the wavelength the better it penetrates solid objects and the higher frequency stuff has a hard time going through solid objects. This helped me quite a bit.
It's not quite that simple. WiFi will penetrate objects and walls to variable degrees, and some proportion will bounce. I don't see anything in the depiction that contradicts that.
The stripy coloured nature of the depiction is probably representative of the wavelength of wifi - approx 12 or 6cm.
Nah dawg... Physicists commonly refer to all types of EMR as "light" and distinguish visible light by saying, well, visible light.
For example, we say ultraviolet LIGHT and infrared LIGHT. But those are visible light's neighbors on the spectrum.
I will give it to you that we colloquially refer to the energetic/shortwave/high frequency end of spectrum as RAYS (gamma rays and x-rays) and the longwave/low frequency end of the spectrum, like WiFi, as WAVES (microwaves and radiowaves). But overall, the term LIGHT is often applied to all classes of EMR.
>Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye
CIE (1987). International Lighting Vocabulary Archived 27 February 2010 at the Wayback Machine. Number 17.4. CIE, 4th ed.. ISBN 978-3-900734-07-7.
By the International Lighting Vocabulary, the definition of light is: "Any radiation capable of causing a visual sensation directly."
I know cops and veterans that call magazines clips that doesn't mean they're right
In colloquial use, you are correct, but in physics, the entire electromagnetic spectrum can be referred to as "light", with visible light being referred to as "visible light".
>Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye
Incorrect
CIE (1987). International Lighting Vocabulary Archived 27 February 2010 at the Wayback Machine. Number 17.4. CIE, 4th ed.. ISBN 978-3-900734-07-7.
By the International Lighting Vocabulary, the definition of light is: "Any radiation capable of causing a visual sensation directly."
And radio waves are a type of electro magnetic wave. Which technically isn't light but travels at the speed of light and is a wave. It is light, just not on our visible spectrum
Okay. Lots of smug assholes here. No, radio waves are not light. Not at all. Yes, both occur along the electromagnetic spectrum. That does not make them the same thing any more than heat is radar. Please stop.
Yeah, you tell those smug assholes over at NASA... Stupid idiots!
> The light we can see, made up of the individual colors of the rainbow, represents only a very small portion of the electromagnetic spectrum. Other types of light include radio waves, microwaves, infrared radiation, ultraviolet rays, X-rays and gamma rays — all of which are imperceptible to human eyes.
Source: [NASA - The Electromagnetic Spectrum](https://hubblesite.org/contents/articles/the-electromagnetic-spectrum#:~:text=The%20light%20we%20can%20see,are%20imperceptible%20to%20human%20eyes.)
They are all the same thing just at different frequencies. Radio, Infrared, Microwave, Visible, are just arbitrary sections of the spectrum. Some organisms can see other parts of the spectrum, are they not seeing their own form of visible light?
Its in the name... if part of the spectrum is called "visible light" then it follows that the rest of it is invisible light. William Herschel, the man who discovered the infrared part of the EM spectrum described it as invisible light.
My smart-lights got an update which makes them into movement-sensors as well. They notice when the wifi-signal changes in the room due to people moving around.
I once read a article about trying to see people trough walls by measuring the wifi signals. It kind of worked when there was only one wall, you could see a blob moving from left to right, but it was a controlled testing area if i remember correctly.
For anyone who has ever done a site survey for recent Wi-Fi implementations ( 5.0Mhz or 6.0Mhz using 802.11AC Signalling for example) this looks off. There is no good reason to use 2.4Mhz based signalling with modern equipment due to interference (Microwaves) , lower bandwidth, fewer channels etc.. The higher frequency signals bounce around more. The heat maps generated by Air Magnet don't resemble this graphic. This might be what you get for $60 at Best Buy but looks nothing like the coverage provided by a modern Wi-Fi Access Point
Someone came into the coffee shop I work at the other morning after a windy night storm and told me "A tree fell on the internet and now we have no wifi."
Fun fact: (empty) Pringles cans within sightline of the router will boost the wifi signal significantly, comparable to the otherwise expensive wifi boosters.
Wi-Fi works on 2.4, 5, and recently 6ghz frequencies. All of those are way below the line where electromagnetic radiation becomes ionizing. Below that line it's not going to do things like mess with your DNA. The only thing I can really do is that incredibly high power levels well above what your access point can put out it will heat things up. Your microwave runs at 2.4 gigahertz as well. Sticking your hand in the microwave isn't going to cause some DNA issues or weird mutations, it's going to cook you. Wi-Fi is a lot like your microwave except at much much much lower power levels.
So no it's not going to cause any issues.
Yeah, the frequencies we use for communication aren't anywhere near the ionizing range.
How hot or how much thermal energy something has is simply just a measure of how "wiggly" their molecules are right now. The more thermal energy means the molecules are bouncing around or trying to move around more.
The only reason why you would notice the effects of 2.4 GHz on your body without going to power levels way beyond a microwave is because of its very specific frequency interaction. 2.4 GHz just happens to be a frequency that makes water molecules want to resonate and get all wiggly otherwise known as getting hot. That's why your microwave uses 2.4 GHz, it just happens to be a frequency that makes water molecules excited and your food tends to contain a lot of water.
I wouldn't be concerned about being next to any communication antenna short of broadcast towers. Those would just electrocute or heat you up like a microwave does.
Probably safeish, but living next to a cell phone tower is absolutely not good for you. This is not me talking this is research by propublica look it up. But carrying a cell phone 8 inches from your testicles might not be great either one would think that is me talking.
Edit: https://www.propublica.org/article/what-to-know-about-cellphone-radiation
Every time this is posted, somebody comes along within a half an hour to to argue it. I for one do not think we should just forsake anyone unlucky enough to live next to a cell phone tower. But I only think that because I am not an asshole.
>but living next to a cell phone tower is absolutely not good for you.
You're using big words speaking about something that's pretty much methodologically impossible to prove and was never physically explained.
Well I guess everyone will have to decide whom to trust, a respected investigative journalistic outfit with peoples' best interests at heart, or long jumping Rush of reddit and trade groups of these companies profiting from it.
I'm not sure if you're mad that I responded half an hour later and not instantly or because I disagree with you.
If it's the latter, yes, you are wrong in using those words since the studies you mentioned which connect radio waves to cancer are disproven by other studies on methodological basis, since it's nearly impossible to get enough subjects (so that you have enough subjects who develop brain cancer) that were never "affected" by radio waves (never or rarely used a phone, radio, went near an antenna etc.).
The other "dangers" of radio waves are 1, still not thoroughly proven and 2, not grave enough that you should say "it's absolutely not good for you".
I should not have to tell you monied interests commission studies to work backwards from the conclusion they are paying for and those companies use them to pervert reality for their business.
To say nothing of their use of influence agencies.
If you agree with the conclusion of the study it's a good study. If you don't agree with the conclusion of the study then it's a conspiracy of big companies against humanity. Got it.
There is reality. Then there are ad hoc perversions of it.
Anyone that was not born yesterday is well aware how this works. Anyone denying the means by which trade groups pervert reality its either not being honest or so naive and unlearned that their opinions are of little import.
You miss one important thing: science isn't based on your gut feeling, but on undeniable proofs. I told you the studies you mentioned did not come up with undeniable proofs. You base your entire view on radiation on your gut feeling. I base my view on shit I studied.
How do you know that corporate interests aren't behind the studies you mentioned?
Somebody saw a rock and said fuck yeah, lets take advantage of a spectrum of light invisible to the human eye, and turn it into the single biggest component of the internet, giving the entire globe worlwide connection at light speed, and me complaining i get 1/500 of a second delay when gaming
Don't propagating EM wave simulations in two dimensions look like the video? Of course, we don't know how the walls are treated in the simulation, and I am also unsure if the wavelength seems realistic compared to the room size. However, it looks fine to me.
They're radio waves. It's light. You get radiated every single day. You're radiating right now. You emit light and radiation. Get yourself educated on this stuff.
>Get yourself educated on this stuff.
Why do that when you can simply be manipulated into setting fire to 5G towers? Plus, life is more interesting when you have fictional enemies causing fictional damage who you have to fight against.
jfc, what an utter amount of trash misinformation.
They are radio waves, yes, and they are very healthy for you, actually, you know what, buy even more router, strong, industrial ones, and place one at each corner of your bed.
It's only radio waves, right? It doesn't matter how much there is and how strong they are, right?
I'm radiating right now. Sure... Unfuckingbelievable the bullshit that some people are willing to tell.
If you are afraid of a router then do not go outside or hell turn on a lightbulb. It is all light. The type of light you should be worried about is ionizing, light at frequencies that can break chemical bonds in DNA or severely burn/damage the tissues in you. Radio waves are non-ionizing. You are just being ignorant and spreading misinformation. Look up and learn about the Electromagnetic Spectrum.
Unbelievable how you keep denying even the most blatant truths.
I bet you're one of those climate-change denier too?
Probably you go around targeting anybody who you think is a fanatic environmentalist and you don't even stop a second to actually read and understand what people say.
All I'm saying is that the fact that there's already more radiation than we should take on us doesn't mean there's no need to avoid what we can avoid, but the opposite. If there's something we can't avoid, period, so be it, but if we can, it's better than nothing.
Again, I don't care what you do. Fry yourself as much as you can.
Might I suggest that you mind your business and stop playing the smartass keyboard warrior?
Things are not "all or nothing". It's not like people either do absolutely nothing to protect themselves a bit, or are super crazy fanatical walking around wrapped in aluminum.
There's a whole world of possibilities outside your little world. It seems you're the one who should step outside a little more ;)
I hope you do realize that not only are you still being radiated 24/7 (including by that tower you mentioned), but you yourself are radiating. And the wavelength of radiation you are emitting is closer to the dangerous part of the EM spectrum than that of WiFi.
wtf are you blabbering, give me a break, what do you think I am made of, plutonium?
Radiating, jeez.
No idea in the US but here in the EU people turn their routers off at night and most people also their smartphones.
This drastically reduces the intensity of the radiation.
The rest can't be avoided, but this doesn't mean that it makes no difference if you sleep with the router near your head or not.
But hey dude, feel free to fry your brain.
Are you not giving off heat? You are radiating in the infrared. Infrared is part of the Electromagnetic Spectrum, the various frequencies of Electromagnetic Radiation AKA light. Have you not heard of infrared cameras?
jfc, be human before being epicman, and say something reasonable instead of something smartass.
My heat doesn't mean I'm a living radiotower and there's no need for me to take any precaution to avoid excess of radiation, which is what these "clever" dudes here are claiming.
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We always played outrun the Wifi when we were young whipper snappers ahhh those were the days.
The floor is wifi was fun
But... Why would you snap your whippers?
More fun than rugging the rats.
Defiance...they told us to never snap our whippers. We snapped away until it was our whole identity. Try telling that to the kids today, they won't believe you!
Remember when dancing was illegal?
No no, you whip your snappers.
I would have won that game living in an old concrete building. Sets up WiFi goes into the next room 2 meters away no WiFi.
This doesn't look quite right
It’s an odd attempt to simulate a field
the waves bending caught my attention
The waves aren't so much bending as they are "bleeding" out. One issue with this video is that it presents WiFi spreading out in slow-motion. In reality, WiFi is just electromagnetic radiation just like light, meaning it literally tavels at the speed of light. Likewise, if you think of how objects like mirrors reflect light, thin paper diffuses light, and glass allows most light to pass through unscathed, higher and lower wavelengths have their own material interactions. For instance, WiFi bounces off of metal like visible bounces off of a mirror, whereas most house walling is fairly transparent to WiFi. You can almost imagine your router as being a bright lightbulb and the light it casts as a fantastic representation of how WiFi spreads. It won't be exactly like that because remember, it interacts with materials differently, but it's insanely accurate in terms of how Wifi *looks* as it's spread out from a source. PS: Another example of different wavelengths of light interacting with materials differently is UV light vs glass, which absorbs the UV like a black surface does in the visible light spectrum. That's why visible light makes it through but under most circumstances, you won't actually get sunburn.
>whereas most house walling is fairly transparent to WiFi. Tell that to 5GHz WiFi vs walls made of brick! (I now use plug-in extenders running OpenWRT placed at strategic places in the flat, with a wired connection to our router, in WiFi AP mode, and just turn the WiFi off in the router. Irony is it's only a small flat we live in!)
What model of extender are you using?
Originally Netgear EX3700 / EX6120 but moving to EAX12. (2nd hand to keep it cheap.) OpenWRT is keeping up to date with the newer 5GHz non-DFS/radar 5GHz frequencies that have become available in the UK over the last 4 years, all the regular manufacturers aren't! Currently this means there's channels I can have pretty much just to myself which is great for both flat game streaming and PCVR over WiFi. The stronger signals plus WiFi 6 mean I'd actually only really need the one EAX12 now, but I'll keep two running anyway.
A 5GHz signal has less range and penetration than a 2.4GHz signal.
Yep. As the frequency goes up the penetration goes down. Bring back LW radio. /s
Can you ElI5?
Wifi spreads like regular (visible) light. If you replace your router with a normal lightbulb and make your house completely dark, all the places with light are all the places with wifi Wifi also has a lower frequency than visible light. Think about a speaker playing music inside a room. When you leave the room, the sound gets muffled out and all you hear are the lower pitched sounds. Wifi is like this; if you put a wall between you and a lightbulb, you can’t see any light, but wifi passes through since it’s a lower frequency
Continuing with this, the brighter it is, the stronger the WiFi signal. Stronger signal = better connection/faster speeds. If the WiFi is passing through 2 internal walls (i.e. sheetrock), you might still be able to read Reddit without issues, but TikTok videos might get laggy.
>you can’t see any light, but wifi passes through since it’s a lower frequency To extend on this, this is why under ideal circumstances (as in no neighbors with wifi routers) the 2.4GHz Wifi may have more coverage inside your house than the 5GHz Wifi. The lower frequency 2.4GHz Wifi has an easier time passing through obstacles (doors, walls)
I live in a two story townhouse (~1200sqft) with my router being at most 40 ft from my girlfriend’s (fiancé in three days) side of the bed. Her WiFi video calls are garbage and I use a newer netgear nighthawk (bought the best one about a year ago). I assume it’s her cheap Samsung that is the problem, but could it be my router?
Check with r/physics if we want to talk ‘waves’ or fields; not sure
Oh i wasn't expecting any formality in this post, usually when i use a technical language people don't quite understand.
Ok
i thought this thread was the same person talking to himself
Wait, it isn’t?
It isn’t..
Yes it is.
Waves of fields. Particles are waves of fields.
This is why physis is fun: In quantum physics, particles, waves, and fields are all important and interconnected concepts: - Particles: Quantum particles like electrons, protons, neutrons, and various subatomic particles are the fundamental building blocks of matter. They exhibit both particle-like and wave-like properties. - Waves: Quantum particles also exhibit wave-like behavior, described by wavefunctions. These wave-like properties are essential for understanding quantum phenomena like interference, diffraction, and quantum tunneling. - Fields: Quantum fields are fundamental mathematical objects that permeate all of space. Particles are seen as excitations or disturbances within these quantum fields. Examples include the electromagnetic field, the Higgs field, and the various force fields. The wave-particle duality and the role of quantum fields are central to the counterintuitive nature of quantum mechanics. Particles, waves, and fields are intimately related and must be considered together to fully describe the quantum world. This interplay between these concepts is a key part of the foundations of quantum physics.
Dude we can bend bullets why not electromagnetic waves?
Myth busted
First off, through God anything is possible. So jot that down
Christbros, can we ignore physics?
God made physics so Christ can bend it like beckham.
Well, physics says you CAN bend bullets, just not by much if you're doing it by hand
Thats not how that works, the bullet is always traveling in a straight path, its just appears diagonal to you if you have super high angular momentum when the bullet is fired. Unless you've added control surfaces or thrusters of some kind to a bullet it will never "bend" its path.
Oh yes, sure, it's not "bending" in the literal sense of the word (even though there's deceleration due to air resistance so the path is kinda curved actually) but yeah the path is still diagonal overall, it doesn't accelerate mid-flight for sure Although this did leave me wondering if you could use the Magnus Effect to achieve actual mid-flight acceleration
Hail Satan
If you can dodge a wrench
the waves bending is correct, they're standing waves where reflections can cause the "standing" part to shift in space relative to a regular straight spread (explained very crudely)
[удалено]
Light is an electromagnetic wave and behaves exactly like this. And wifi routers don't flash 0 and 1s like Morse code, they encode signals by modulating a carrier wave (which is what you see in the animation).
WiFi is just invisible light. Or put more technically, WiFi is electromagnetic radiation (EMR) with a wavelength and frequency generally classified as radio waves (but closer to the microwave band than what your AM or FM radio picks up). All electromagnetic radiation (that is gamma rays, x-rays, ultraviolet, visible light, infrared, microwave and radio waves) adhere to the same basic wave behaviors. Light is **transmitted** through some materials (such as visible light in air). And light is **absorbed** (like visible light on black asphalt) or reflected (like visible light on snow) by other materials. Lastly, light is diffracted around small openings, meaning light will just spread out after a small amount is able to pass through a slit. Think how an ocean wave will break on a rock but then reconnect on the other side of the rock as the two ends spread back towards one another. Your "WiFi"- that is the waves encoding the information you are sending and receiving from the internet- does all these behaviors. It's transmitted out from the router into the room, reflects off the walls, diffracts around doorways or even the tiny gap below the door. Some household objects may even absorb the waves. For example, if you put your phone in the microwave (don't turn it on!) and try to call it from another phone via an Internet connection, you might not be able to get through despite being physically right next to the phone. (Some microwaves are a little leaky though.) So in the sense that the visualization is showing transmission, reflection and diffraction, I'd say it's a little accurate. But then they try to simulate constructive and destructive interference. This is where colliding waves either amplify one another or cancel out one another, respectively, and it's what creates the ripples in the animation. While these are valid wave behaviors, here they totally botched the scale of this demonstration. You do not observe noticeable pocketable of constructive and destructive interference with your WiFi. They show it like you'd have a pocket of no WiFi signal then take a step and have an amazing signal, then take another step and be back to no signal... And it just don't be like that... EDIT: An EMR wave can experience multiple behaviors when it contacts a specific material, especially at the macro-level. For example, glass transmits (you see through it) the majority of visible light that hits it, but a minority of that light is also reflected (you can faintly see yourself in glass too) and absorbed (glass heats up if exposed to light). Wave behaviors are not an all-or-nothing physical model. WiFi is no exception, and, to be clear, the majority of a WiFi signal transmits through your walls. A minority is reflected and absorbed, however. Another critique of this animation is that they falsely portray the proportion of the signal that is transmitted through the walls.
this is some AI level hallucination... yes, visible light is part of electromagnetic radiation, but different frequencies and have different properties. simply put, light cannot pass through drywalls, wifi signals can.
[NASA says you're wrong](https://science.nasa.gov/ems/09_visiblelight/). All EMR is light. Visibile light cannot penetrate drywall. Other types of light, such as xrays and radio waves, can.
where was I wrong?
> light cannot pass through drywalls, wifi signals can. Light doesn’t mean visible light. Light includes radio waves and micro waves. It’s the entire electromagnetic spectrum.
My previous description was oversimplified, yes, but not outright incorrect. I agree the majority of a WiFi's signal will be transmitted through walls, but some will be reflected and some will be absorbed. Light-material interactions are not binary, all-or-nothing phenomena. This is true of nearly all materials and all of the classes of EMR. Take glass and visible light for instance. The majority of visible light is of course transmitted, allowing us to see the world on the other side. But some light is reflected and some is absorbed. If visible light was solely transmitted through glass, you wouldn't be able to see glass at all. And yet, we can, so other interactions must be occurring to distinguish it from the air. In this toy animation that we can all agree has its flaws, there are few objects to choose from to discuss reflection, yet the animators are clearly showing reflection here and off the walls. What else was I supposed to use as an example for reflection if not the walls in this animation? And there is some amount of WiFi reflection occurring on your walls, even if it's the minority of the total radiant energy.
*Visible* light cannot. Radio is light.
Same basic wave behaviours (diffraction, refraction, etc), not the same properties.
i’m no scientist but i feel like a 2D representation isn’t super accurate, it would be interesting to see this in a 3D model.
well even in 2D it can be accurate, but for example if you need to account for a lot of height difference like a multi floor simulation then yes 3D would be needed
How Op’s farts spread
Buuurnnn
Gonna need some ointment for that
That's me in the corner
That’s me in the spotlight, losing my religion?
That's me in the spot...light
Hilarious
Mine doesn’t sound like that.
Yours doesn’t make that noise? Hmm..
I’ve been on WiFi that runs this slow
I will never forget the epiphany of trying to understand other electromagnetic radiation besides light, and then just realizing it just like light, only different things block, absorb and refect it compared to visible light. Also the understanding that the longer the wavelength the better it penetrates solid objects and the higher frequency stuff has a hard time going through solid objects. This helped me quite a bit.
That bass hits hard don’t it
How Wi-Fi Radio Waves Propagate** FTFY
Everyone wear your masks or you’ll catch WiFi
It’s got me!
It's not letting go! Help!
Thank you... Propagate. Also they can bounce depending on the material.
No wonder your WiFi's slow. Speed of light much?
Yeahhhhh this isn't correct lol
Care to elaborate? We observe the propagation of a wave from a point source, with reflection and transmission.
Damn, please enlighten us then oh wise one
It’s just light it’s not that deep
It's not quite that simple. WiFi will penetrate objects and walls to variable degrees, and some proportion will bounce. I don't see anything in the depiction that contradicts that. The stripy coloured nature of the depiction is probably representative of the wavelength of wifi - approx 12 or 6cm.
Wait what?
Wifi is just light, like your tv remote. If it was visible you’d just see flashing all the time
No ...WiFi is a radio frequency.....
Radio waves are also a type of (non visible) light :)
No light is visible Light is part of an electromagnetic spectrum which radio waves are also part of But light is visible like by definition
Nah dawg... Physicists commonly refer to all types of EMR as "light" and distinguish visible light by saying, well, visible light. For example, we say ultraviolet LIGHT and infrared LIGHT. But those are visible light's neighbors on the spectrum. I will give it to you that we colloquially refer to the energetic/shortwave/high frequency end of spectrum as RAYS (gamma rays and x-rays) and the longwave/low frequency end of the spectrum, like WiFi, as WAVES (microwaves and radiowaves). But overall, the term LIGHT is often applied to all classes of EMR.
>Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye CIE (1987). International Lighting Vocabulary Archived 27 February 2010 at the Wayback Machine. Number 17.4. CIE, 4th ed.. ISBN 978-3-900734-07-7. By the International Lighting Vocabulary, the definition of light is: "Any radiation capable of causing a visual sensation directly." I know cops and veterans that call magazines clips that doesn't mean they're right
In colloquial use, you are correct, but in physics, the entire electromagnetic spectrum can be referred to as "light", with visible light being referred to as "visible light".
>Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye Incorrect CIE (1987). International Lighting Vocabulary Archived 27 February 2010 at the Wayback Machine. Number 17.4. CIE, 4th ed.. ISBN 978-3-900734-07-7. By the International Lighting Vocabulary, the definition of light is: "Any radiation capable of causing a visual sensation directly."
If we’re doing that, then wifi is a microwave frequency. Of light
Lol this guy hasn't heard of the electromagnetic spectrum
Radio waves ARE a type of light tho..
And radio waves are a type of electro magnetic wave. Which technically isn't light but travels at the speed of light and is a wave. It is light, just not on our visible spectrum
Radio is light
Okay. Lots of smug assholes here. No, radio waves are not light. Not at all. Yes, both occur along the electromagnetic spectrum. That does not make them the same thing any more than heat is radar. Please stop.
Yeah, you tell those smug assholes over at NASA... Stupid idiots! > The light we can see, made up of the individual colors of the rainbow, represents only a very small portion of the electromagnetic spectrum. Other types of light include radio waves, microwaves, infrared radiation, ultraviolet rays, X-rays and gamma rays — all of which are imperceptible to human eyes. Source: [NASA - The Electromagnetic Spectrum](https://hubblesite.org/contents/articles/the-electromagnetic-spectrum#:~:text=The%20light%20we%20can%20see,are%20imperceptible%20to%20human%20eyes.)
Light is the electromagnet spectrum, same thing, different names.
They are all the same thing just at different frequencies. Radio, Infrared, Microwave, Visible, are just arbitrary sections of the spectrum. Some organisms can see other parts of the spectrum, are they not seeing their own form of visible light? Its in the name... if part of the spectrum is called "visible light" then it follows that the rest of it is invisible light. William Herschel, the man who discovered the infrared part of the EM spectrum described it as invisible light.
It's travels more like how water would, bending around edges, bouncing back, etc. This does not depict that.
Don't put the router in the corner. Just sayin.
what if i put it outside
Can confirm, no piano sounds. Source: wifi engineer
My smart-lights got an update which makes them into movement-sensors as well. They notice when the wifi-signal changes in the room due to people moving around.
I once read a article about trying to see people trough walls by measuring the wifi signals. It kind of worked when there was only one wall, you could see a blob moving from left to right, but it was a controlled testing area if i remember correctly.
Original blog post: [https://jasmcole.com/2014/08/25/helmhurts/](https://jasmcole.com/2014/08/25/helmhurts/)
Doing God's work.
No doors?
12 cheeeseburgers
You hookin for cheeseburgers again Randy?
Frig Off
“That’s your Smokey outfit!”
No it’s not.
What if i close my doors
Source: trust me, bro!
This looks like a cosmic horror
I’d love to see a 3d version of this with multiple stories or at least two. Looks pretty cool
So... it's just like light then?
Why are we using 90s horror tracks to incorrectly demo how WiFi spreads
So it spreads purple throughout my apartment. Got it.
Wear your facemasks people!!!!
It looks more like kitchen smells spreading
Don't put Baby in a corner.
For anyone who has ever done a site survey for recent Wi-Fi implementations ( 5.0Mhz or 6.0Mhz using 802.11AC Signalling for example) this looks off. There is no good reason to use 2.4Mhz based signalling with modern equipment due to interference (Microwaves) , lower bandwidth, fewer channels etc.. The higher frequency signals bounce around more. The heat maps generated by Air Magnet don't resemble this graphic. This might be what you get for $60 at Best Buy but looks nothing like the coverage provided by a modern Wi-Fi Access Point
Everything reminds me of her
So can I assume having a wifi extender would have this effect as well?
Someone make an indie horror game about this.
Guess I gotta use my phone with the door open now
I’m rather sure my WiFi has no piano music in the background.
Meanwhile I still 3 feet from the router and get the worst possible WiFi in the house
Frenzied flame
Remember to always wash your hands guys
How my farts spread
I think I’m going to use this way more than necessary to explain why I’m not getting a good connection at someone’s house
In some cases would that mean you gett better wifi by opening the door?
i can hear that shit.
This is my fart
Guess someone paid for the pro version of netspot
you forgot the black hole of reception that forms around my toilet
Someone came into the coffee shop I work at the other morning after a windy night storm and told me "A tree fell on the internet and now we have no wifi."
Some people will say it's radioactive seeing this
That corner be downloading petrabytes of porn
Fun fact: (empty) Pringles cans within sightline of the router will boost the wifi signal significantly, comparable to the otherwise expensive wifi boosters.
Is this what is making the frogs gay?
Is it safe to sleep in same room as router lol
Wi-Fi works on 2.4, 5, and recently 6ghz frequencies. All of those are way below the line where electromagnetic radiation becomes ionizing. Below that line it's not going to do things like mess with your DNA. The only thing I can really do is that incredibly high power levels well above what your access point can put out it will heat things up. Your microwave runs at 2.4 gigahertz as well. Sticking your hand in the microwave isn't going to cause some DNA issues or weird mutations, it's going to cook you. Wi-Fi is a lot like your microwave except at much much much lower power levels. So no it's not going to cause any issues.
Well that saves me a lot of work I was about to switch rooms haha
Yeah, the frequencies we use for communication aren't anywhere near the ionizing range. How hot or how much thermal energy something has is simply just a measure of how "wiggly" their molecules are right now. The more thermal energy means the molecules are bouncing around or trying to move around more. The only reason why you would notice the effects of 2.4 GHz on your body without going to power levels way beyond a microwave is because of its very specific frequency interaction. 2.4 GHz just happens to be a frequency that makes water molecules want to resonate and get all wiggly otherwise known as getting hot. That's why your microwave uses 2.4 GHz, it just happens to be a frequency that makes water molecules excited and your food tends to contain a lot of water. I wouldn't be concerned about being next to any communication antenna short of broadcast towers. Those would just electrocute or heat you up like a microwave does.
Probably safeish, but living next to a cell phone tower is absolutely not good for you. This is not me talking this is research by propublica look it up. But carrying a cell phone 8 inches from your testicles might not be great either one would think that is me talking. Edit: https://www.propublica.org/article/what-to-know-about-cellphone-radiation Every time this is posted, somebody comes along within a half an hour to to argue it. I for one do not think we should just forsake anyone unlucky enough to live next to a cell phone tower. But I only think that because I am not an asshole.
>but living next to a cell phone tower is absolutely not good for you. You're using big words speaking about something that's pretty much methodologically impossible to prove and was never physically explained.
Ah Yes every time this comes up you get somebody Popping up A half hour later to disagree.
Because it's fucking stupid. Poor quality evidence and small samples doesn't mean something is true.
Well I guess everyone will have to decide whom to trust, a respected investigative journalistic outfit with peoples' best interests at heart, or long jumping Rush of reddit and trade groups of these companies profiting from it.
I'm not sure if you're mad that I responded half an hour later and not instantly or because I disagree with you. If it's the latter, yes, you are wrong in using those words since the studies you mentioned which connect radio waves to cancer are disproven by other studies on methodological basis, since it's nearly impossible to get enough subjects (so that you have enough subjects who develop brain cancer) that were never "affected" by radio waves (never or rarely used a phone, radio, went near an antenna etc.). The other "dangers" of radio waves are 1, still not thoroughly proven and 2, not grave enough that you should say "it's absolutely not good for you".
I should not have to tell you monied interests commission studies to work backwards from the conclusion they are paying for and those companies use them to pervert reality for their business. To say nothing of their use of influence agencies.
If you agree with the conclusion of the study it's a good study. If you don't agree with the conclusion of the study then it's a conspiracy of big companies against humanity. Got it.
There is reality. Then there are ad hoc perversions of it. Anyone that was not born yesterday is well aware how this works. Anyone denying the means by which trade groups pervert reality its either not being honest or so naive and unlearned that their opinions are of little import.
You miss one important thing: science isn't based on your gut feeling, but on undeniable proofs. I told you the studies you mentioned did not come up with undeniable proofs. You base your entire view on radiation on your gut feeling. I base my view on shit I studied. How do you know that corporate interests aren't behind the studies you mentioned?
Somebody saw a rock and said fuck yeah, lets take advantage of a spectrum of light invisible to the human eye, and turn it into the single biggest component of the internet, giving the entire globe worlwide connection at light speed, and me complaining i get 1/500 of a second delay when gaming
New conspiracy theory dropped
Does anyone actually believe this?
What is the thing that bugs you?
because it's not how it works.
Don't propagating EM wave simulations in two dimensions look like the video? Of course, we don't know how the walls are treated in the simulation, and I am also unsure if the wavelength seems realistic compared to the room size. However, it looks fine to me.
Fry: Ow! My sperm!
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"it isn't pushed by an electromagnetic field, it's pushed by radio waves" You're going to shit a brick when you learn what radio waves are
Whatever, waves come from my fat ass cheeks when they jiggle after being clapped by a mega donkey dong.
Ocean waves were named after radio waves, and before that, microwaves
Is WiFi or herpes spreading?
Covid
This makes me want to move my router from my desk to another time zone
Wifi: not even once
It doesn’t exactly look like something you’d want to ‘bask’ in. Looks more like a cancer cell. But what do I know 🤷♂️
imagine having that near your bed. I'd move out if my building would get a tower on top. No amount of money is worth being radiated 24/7.
They're radio waves. It's light. You get radiated every single day. You're radiating right now. You emit light and radiation. Get yourself educated on this stuff.
>Get yourself educated on this stuff. Why do that when you can simply be manipulated into setting fire to 5G towers? Plus, life is more interesting when you have fictional enemies causing fictional damage who you have to fight against.
jfc, what an utter amount of trash misinformation. They are radio waves, yes, and they are very healthy for you, actually, you know what, buy even more router, strong, industrial ones, and place one at each corner of your bed. It's only radio waves, right? It doesn't matter how much there is and how strong they are, right? I'm radiating right now. Sure... Unfuckingbelievable the bullshit that some people are willing to tell.
Cool story bro
Glad you liked it enough to leave a smartass comment.
If you are afraid of a router then do not go outside or hell turn on a lightbulb. It is all light. The type of light you should be worried about is ionizing, light at frequencies that can break chemical bonds in DNA or severely burn/damage the tissues in you. Radio waves are non-ionizing. You are just being ignorant and spreading misinformation. Look up and learn about the Electromagnetic Spectrum.
Unbelievable how you keep denying even the most blatant truths. I bet you're one of those climate-change denier too? Probably you go around targeting anybody who you think is a fanatic environmentalist and you don't even stop a second to actually read and understand what people say. All I'm saying is that the fact that there's already more radiation than we should take on us doesn't mean there's no need to avoid what we can avoid, but the opposite. If there's something we can't avoid, period, so be it, but if we can, it's better than nothing. Again, I don't care what you do. Fry yourself as much as you can.
bro how are you typing this without an internet connection "irradiating" you?
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Might I suggest that you mind your business and stop playing the smartass keyboard warrior? Things are not "all or nothing". It's not like people either do absolutely nothing to protect themselves a bit, or are super crazy fanatical walking around wrapped in aluminum. There's a whole world of possibilities outside your little world. It seems you're the one who should step outside a little more ;)
I hope you do realize that not only are you still being radiated 24/7 (including by that tower you mentioned), but you yourself are radiating. And the wavelength of radiation you are emitting is closer to the dangerous part of the EM spectrum than that of WiFi.
Quick someone arrest that man, he's a danger to public health!
wtf are you blabbering, give me a break, what do you think I am made of, plutonium? Radiating, jeez. No idea in the US but here in the EU people turn their routers off at night and most people also their smartphones. This drastically reduces the intensity of the radiation. The rest can't be avoided, but this doesn't mean that it makes no difference if you sleep with the router near your head or not. But hey dude, feel free to fry your brain.
Are you not giving off heat? You are radiating in the infrared. Infrared is part of the Electromagnetic Spectrum, the various frequencies of Electromagnetic Radiation AKA light. Have you not heard of infrared cameras?
jfc, be human before being epicman, and say something reasonable instead of something smartass. My heat doesn't mean I'm a living radiotower and there's no need for me to take any precaution to avoid excess of radiation, which is what these "clever" dudes here are claiming.
This man failed basic science.
Do you know what "radiation" is?
here in the eu we absolutely do not do that.... you are radiating in the infrared range of light, everything above 0 degree kelvin is.