Post by bartcPost by Malcolm McLeanPost by a***@gmail.comCan one cellphone capable emit the right frequency wave elettro magnetic
for cause cancer? (if that exist)
Unlikely. Cellphone waves are about half a metre long. Cells are 10 to 100
micrometres long. So the radio waves are unlikely to excite anything
damaging within the cell. Gamma rays (< 1 nano metre) and even visible
light (400-700 nanometres) can however cause cancer.
Visible light does not cause cancer - it is easily blocked by the outer
layers of dead skin cells. And even if it were not, it is too low
frequency (or too high wavelength) to damage the DNA. To cause cancer,
you need to damage (ionise) DNA or other critical molecules in the cells
- and these are a lot smaller than the cell sizes. So you need at least
ultraviolet light to cause damage that could lead to cancer. (Thus lots
of sunshine can be a cancer risk - lots of indoor lighting is not.)
Post by bartc1.8GHz waves would be 17cm. Microwave ovens work at 2.5GHz, some 12cm
(about the same as WiFi actually), and they can cook food. Including,
presumably, live flesh.
Yes. But contrary to popular belief, microwave ovens don't work by
ionising water or fat molecules, or causing them to resonate by sending
microwaves that have wavelengths that match the size of water molecules.
So microwaves don't cause any molecular damage in the way that gamma
rays or hard x-rays can - it is just dialectric heating.
Post by bartcSo a different kind of damage, but unlikely given the somewhat different
frequency (I don't know how critical that is), and the fact that few
cellphones radiate 800W of RF.
Certainly cellphones (and Wifi modules, and Bluetooth modules) can cause
heating in water and fat based stuff - like most of your food, and most
of your body. But you'd have to implant the phone on the inside of your
brain and turn up the RF power by a few orders of magnitude to make a
bigger difference to your brain temperature than you get from thinking
hard. (As you say, phones don't give off 800W of microwave power.) The
main source of cellphone to brain heating is the warmth from the phone
conducted through your ear, rather than RF radiation.
So if phones were going to cause cancer through heating, sticking your
finger in your ear is likely to have a bigger effect.