Does a Kindle with wifi disabled still emit radiation?

Question

Hi

I've always tried to avoid wifi by using wired router, printer etc. I've established that it's possible to download books to a kindle by using usb cable instead of wifi connection, and wondered if I disable wifi if it still emits radiation?

Also, if wifi is disabled, would this affect a pacemaker?

Thanks

Answer 1

Yes, it will still emit a small amount of radio frequency non-ionising radiation. All electronics does, as soon as you have any electronics it's impossible to avoid completely.

It will however emit a lot less than the computer you're using to read this reply, a TV or even most cars.



Generally the higher power a device is or the higher its CPU is clocked the more radiation it puts out. The kindle is low power and has a slow CPU so the amount it will radiate will be tiny.



Having said that anything which isn't intentionally radiating is required to pass EU and FCC testing to ensure it doesn't emit over a certain amount. That threshold is such that once you get a few feet away you'll be getting more radio energy from a TV station 20 miles away than you will from a device that's right at the limits. I'd expect the kindle to be well below those limits.

Computers on the other hand are right at those limits, one loose screw on the case or incorrectly inserted face plate (or case with a transparent side panel) and they are over the limits by a factor of 10.



Anything with an intentional transmitter (e.g. a wifi device or router with the wifi enabled) will obviously put out a lot more energy.



With wifi disabled it won't have any impact on a pacemaker. As indicated above, if it did then someone with a pacemaker would have to spend their life in a cave miles from any electronics.



To be honest even with wifi enabled it shouldn't be an issue for a pacemaker, no pacemaker would get approval for use in humans if it there was any meaningful risk of it getting disrupted by a low power wifi device.

However for a kindle the battery life impact alone is a good enough reason to keep the wifi off all of the time except when you are downloading a new book.

Answer 2

all electrical kit emits radiation (emf) it cannot help it.



all kosher kit is limited by regulation to within reasonable tolerance levels when in good repair, EU regs are quite strict and low very little broad band power to be emitted.



so, top made classy kit could be right next to a pacemaker and not harm (though of course you wouldn't risk it as an experiment)



Phones and transmitters like Wi-Fi are weak but not negligible; the closer you are the more radio waves you'll absorb and it could be a phone on your ear for hours would warm up adjacent brain cells.



At the other extreme we once tested a new but cheap (Far Eastern) microwave cooker and it was leaking microwaves to the extent you could cook something OUTSIDE the door - hopefully they are better these days but I'd never stand close to one, I do not want boiled eyeballs.



The power emitted reduces as the square of the distance away - so hold the device twice as far from you and receive only quarter the power and so on.



Your Kindle if genuine is quality kit and effects will be minimal if it is on your lap. Probably, it's Wi-Fi is ok too but I would do wat you do, a remote hub via usb.



even the usb cable emits something, and a magnetic field, but ever so little.



Experiment. Hold a mobile phone near a transistor radio extension aerial. Start phone up. Radio will crackle to the calling tone of the phone, quite a lot, too. Any waveband, which means it is a broad effect.

Answer 3

NO not radiation but radio waves and yes, it wIFI will be open each time your router is on even if you are using USB.

Answer 4

Very little radiation comes of kindle .It is just like using a microwave