Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
The thing people lose site of is that it's not necessarily radiation per se, but more just the HEAT produced by the radios that up close to the body is what even apple recommends against (for phones at least). Not sure if anyone has done any temperature tests of the back of the device heat dissipation when using LTE heavily. Maybe that is why apple used ceramic on the LTE watch, it doesn't directly transfer heat as much.
The watch runs extremely cool even under heavy LTE or Wi-Fi strain (have done back to back podcast downloads over LTE where it is constantly pinging that chip and no heat can be felt, the phone gets very hot, but that doesn’t seem to be a problem with the watch.)
 
The thing people lose site of is that it's not necessarily radiation per se, but more just the HEAT produced by the radios that up close to the body is what even apple recommends against (for phones at least). Not sure if anyone has done any temperature tests of the back of the device heat dissipation when using LTE heavily. Maybe that is why apple used ceramic on the LTE watch, it doesn't directly transfer heat as much.

Apple releases radiation levels in SAR. Also, YouTube has a bunch of folks taking radiation meters to various Apple products and getting crazy results.
 
I don't know man, I'm just going to enjoy life, enjoy my devices and if they happen to kill me a little sooner than if I didn't have them - so be it. At least they will have captured some great photography of me living life to the fullest.
 
But the evidence of the woman whose breast cancer shape matches the shape of her cellphone is alarming.

Fake or coincidence. Why would it be in the shape of a phone? The phone emits from a specific point or antenna.
[doublepost=1515380125][/doublepost]
I don't know man, I'm just going to enjoy life, enjoy my devices and if they happen to kill me a little sooner than if I didn't have them - so be it. At least they will have captured some great photography of me living life to the fullest.

I’ve been using mine to take photos of these new moles I’m getting around my ear. Very useful.
 
I honestly just keep LTE off until I need to use it. Then I turn it on. Problem solved.

That's probably smart both for battery life and radiation.

EDIT: Although doesn't help if you're actually using it...although hopefully it's not normally transmitting too much data...
 
Is anyone concerned about LTE on an Apple Watch? From what I understand Bluetooth has about 1/1000 the radiation level of LTE, so having that kind of powerful signal strapped on your skin seems worrisome.

I've been googling to see if I can get some hard info on this, but you know how it is, sensational studies with flawed methodologies and not enough in the way of peer reviewed research to shed enough light on this. I'd like to upgrade but I'd likely go with the bluetooth only model for peace of mind.
You guys seriously keep your cell phone in your pocket at all times? when I'm home its on a table and away from me, its away from me when I sleep, if I'm working at a desk I keep it on the desk. I try to keep my cell phone not on me, I surely wouldn't want a cellular Apple Watch strapped to my wrist all day. I do feel having a cell phone on you at all times isn't a good thing for you.
Is anyone concerned about LTE on an Apple Watch? From what I understand Bluetooth has about 1/1000 the radiation level of LTE, so having that kind of powerful signal strapped on your skin seems worrisome.

I've been googling to see if I can get some hard info on this, but you know how it is, sensational studies with flawed methodologies and not enough in the way of peer reviewed research to shed enough light on this. I'd like to upgrade but I'd likely go with the bluetooth only model for peace of mind.[
[doublepost=1516100103][/doublepost]See this important video:

 
The problem with an article like that is that it's a straight-up opinion piece which offers no evidence of anything. Meanwhile, there's still evidence that there's not much to worry about.

Well I agree it's a straight up opinion piece, but it points out that the study said it doesnt affect people because the 9hrs the rats were subjected to cellular signals is far more than those that use cell phones.

But the point is, that doesnt apply to a watch, which is worn for 24hr periods. Something to think about. But yea, opinion piece.
 
  • Like
Reactions: Orangeman13
Well I agree it's a straight up opinion piece, but it points out that the study said it doesnt affect people because the 9hrs the rats were subjected to cellular signals is far more than those that use cell phones.

But the point is, that doesnt apply to a watch, which is worn for 24hr periods. Something to think about. But yea, opinion piece.

That study has been a mess. They need to start again.

https://arstechnica.com/science/201...use-cancer-in-rats-is-riddled-with-red-flags/
https://arstechnica.com/science/201...ne-safety-study-backtracks-on-earlier-claims/
 

I agree with that. However, these conflicting studies do remind me of the tobacco industry. And per the article, radiation is a function of proximity and duration of exposure. Sometimes you have to make up your own mind on these things. Some people did for tobacco, and others saw what they wanted to see. As always, YMMV.
 
I assumed everyone with the Apple Watch just takes a potassium iodide tablet every day. Because radiation, thats why. Frankly who cares, none of us will live forever anyway. Why is everyone so afraid of everything? Need to take the bubble wrap off the world around us. It'll be ok, and if it kills us we'll never know the difference.
 
A lesson on radiation flux.

Every second of every day of your life, 650 trillion neutrinos from solar radiation flux pass through your body. Over the course of a roughly 80 year lifetime, only one of those many trillions upon trillions upon trillions of neutrinos will actually interact with one of the atoms in your body. Neutrinos barely interact with matter at all, so even though there's a huge stream of them passing through you constantly, they don't do a thing to you.

Huge radiation flux, zero net biological effect.

Now let's look at the other extreme end of the spectrum. If an astronaut stood on the surface of Io, which is Jupiter's innermost major moon, the radiation flux from Jupiter's magnetic field would give that astronaut a lethal dose of radiation in less than an hour. Jupiter's magnetic field carries a huge flux of charged particles travelling at near-relativistic velocities, and when they collide with the atoms in your body, they do it with a vengeance, and they cause a great deal of damage.

Huge radiation flux, almost immediately lethal biological effect.

What about cell phone radiation? Wi-Fi and LTE are both a very low energy flux of very low wavelength microwave radiation. Everything on the electromagnetic spectrum below X-rays - ultraviolet, visible light, infrared, microwaves, and radio waves - is non-ionising radiation. Non-ionising radiation doesn't knock electrons out of their nominal orbits (which is what X-rays tend to do) or cause state changes in the protons or neutrons in an atomic nucleus (which is what gamma rays tend to do).

When you have a very low energy flux of low wavelength, non-ionising radiation, it does... wait for it... absolutely nothing to biological tissues. You could wear an Apple Watch on your wrist for 100,000 years and never develop cancer from the radiation it emits.

In other words: tiny radiation flux, zero net biological effect.

Non-ionising microwave radiation can cause damage to biological tissue - if the radiation flux is powerful enough. This is why standing right next to an active cell tower (and I mean right next to the antenna, not on the street below) is generally a Bad Idea. However, this radiation flux is several orders of magnitude more powerful than any handheld or wristworn device can ever emit.

TL;DR: Wi-Fi and LTE don't cause any biological harm whatsoever. The energy emitted is too low, and the radiation wavelength is both very long and non-ionising, all of which contribute to a radiation flux that simply passes straight through you with no effect at all - just like the 100 quadrillion solar neutrinos that shot through you in the time it took to read this post.
 
  • Like
Reactions: BigMcGuire
I assumed everyone with the Apple Watch just takes a potassium iodide tablet every day. Because radiation, thats why. Frankly who cares, none of us will live forever anyway. Why is everyone so afraid of everything? Need to take the bubble wrap off the world around us. It'll be ok, and if it kills us we'll never know the difference.

But what will my kids do with the spare bedroom that I filled with rolls of tin foil, just in case? Then there's all the duct tape and plastic sheeting. Oh my.
[doublepost=1517780581][/doublepost]
A lesson on radiation flux.

Every second of every day of your life, 650 trillion neutrinos from solar radiation flux pass through your body. Over the course of a roughly 80 year lifetime, only one of those many trillions upon trillions upon trillions of neutrinos will actually interact with one of the atoms in your body. Neutrinos barely interact with matter at all, so even though there's a huge stream of them passing through you constantly, they don't do a thing to you.

Huge radiation flux, zero net biological effect.

Now let's look at the other extreme end of the spectrum. If an astronaut stood on the surface of Io, which is Jupiter's innermost major moon, the radiation flux from Jupiter's magnetic field would give that astronaut a lethal dose of radiation in less than an hour. Jupiter's magnetic field carries a huge flux of charged particles travelling at near-relativistic velocities, and when they collide with the atoms in your body, they do it with a vengeance, and they cause a great deal of damage.

Huge radiation flux, almost immediately lethal biological effect.

What about cell phone radiation? Wi-Fi and LTE are both a very low energy flux of very low wavelength microwave radiation. Everything on the electromagnetic spectrum below X-rays - ultraviolet, visible light, infrared, microwaves, and radio waves - is non-ionising radiation. Non-ionising radiation doesn't knock electrons out of their nominal orbits (which is what X-rays tend to do) or cause state changes in the protons or neutrons in an atomic nucleus (which is what gamma rays tend to do).

When you have a very low energy flux of low wavelength, non-ionising radiation, it does... wait for it... absolutely nothing to biological tissues. You could wear an Apple Watch on your wrist for 100,000 years and never develop cancer from the radiation it emits.

In other words: tiny radiation flux, zero net biological effect.

Non-ionising microwave radiation can cause damage to biological tissue - if the radiation flux is powerful enough. This is why standing right next to an active cell tower (and I mean right next to the antenna, not on the street below) is generally a Bad Idea. However, this radiation flux is several orders of magnitude more powerful than any handheld or wristworn device can ever emit.

TL;DR: Wi-Fi and LTE don't cause any biological harm whatsoever. The energy emitted is too low, and the radiation wavelength is both very long and non-ionising, all of which contribute to a radiation flux that simply passes straight through you with no effect at all - just like the 100 quadrillion solar neutrinos that shot through you in the time it took to read this post.

Slightly to one side of the topic, but what do we know about Energous truly wireless charging?
 
Slightly to one side of the topic, but what do we know about Energous truly wireless charging?

It uses the RF (radio frequency) band, which is a longer wavelength than microwave. The energy of the flux will presumably be higher since it's transmitting power rather than data, but according to Energous, "When devices are being charged, RF exposure is always less, and usually substantially less than FDA/FCC regulated limits."
 
It uses the RF (radio frequency) band, which is a longer wavelength than microwave. The energy of the flux will presumably be higher since it's transmitting power rather than data, but according to Energous, "When devices are being charged, RF exposure is always less, and usually substantially less than FDA/FCC regulated limits."

Thanks - I guess that remains to be demonstrated. I may invest in aluminum kitchen products companies in the meantime. :D
 
  • Like
Reactions: BigMcGuire
You guys seriously keep your cell phone in your pocket at all times? when I'm home its on a table and away from me, its away from me when I sleep, if I'm working at a desk I keep it on the desk. I try to keep my cell phone not on me, I surely wouldn't want a cellular Apple Watch strapped to my wrist all day. I do feel having a cell phone on you at all times isn't a good thing for you.

Course, "feelings" are a good thing to pay attention to...but they aren't science. I wonder how often what someone feels becomes the influence behind what they declare to be truth even though it's not. Don't take this comment personally, it just got me thinking.
 
Is anyone concerned about LTE on an Apple Watch? From what I understand Bluetooth has about 1/1000 the radiation level of LTE, so having that kind of powerful signal strapped on your skin seems worrisome.

I've been googling to see if I can get some hard info on this, but you know how it is, sensational studies with flawed methodologies and not enough in the way of peer reviewed research to shed enough light on this. I'd like to upgrade but I'd likely go with the bluetooth only model for peace of mind.

Everyone please contact President Trump about the WIFI CRISES. It is real and you can`t see it.
 
one of the better explanations of this. It's harmless.
"Hitchhiker's Guide to the Galaxy, entry 'Apple Watch LTE', description: 'Harmless.'". May get a revised entry in the future, similar to the revised entry for 'Earth'.
 
A lesson on radiation flux.
Non-ionising microwave radiation can cause damage to biological tissue - if the radiation flux is powerful enough. This is why standing right next to an active cell tower (and I mean right next to the antenna, not on the street below) is generally a Bad Idea. However, this radiation flux is several orders of magnitude more powerful than any handheld or wristworn device can ever emit.

TL;DR: Wi-Fi and LTE don't cause any biological harm whatsoever. The energy emitted is too low, and the radiation wavelength is both very long and non-ionising, all of which contribute to a radiation flux that simply passes straight through you with no effect at all - just like the 100 quadrillion solar neutrinos that shot through you in the time it took to read this post.

You understand that doesnt stand up to basic logic. You agree that standing RIGHT next to a tower will toast you. Literally cook you, much like, or exactly like a microwave oven. So now stand 2 feet away, still will do a lot of harm. Now stand 10 feet away, much better, but stand there long enough, it still affects you.

So the effect is a FUNCTION of exposure time, exposure distance, and intensity. The point is the watch couldn't be closer without literally being inside you. The exposure time is near constant for many people wearing it. So while the transceiver in the watch is way weak compared to the tower, it's by DEFINITION the very same kind of radiation that is well established as being harmful at the tower.

Now perhaps the math of the function works out that despite its infinitely close proximity, and constant contact, the power output is still so low that it wont affect you. But some male rats only had 9hrs (much less the 24hr contact many have with their apple watches) of exposure, way way less than a cell tower, and they would beg to differ if they could...
 
Slightly off topic. . .

I’m interested in the non lte version of the apple watch 3 and noticed the SAR values on apples site of this version are lower then its predecessors.

Is it good that the numbers are lower or no change?

Thx
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.