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Alf Beharie wrote:
Ever heard of a microwave oven?...There is a reason they use microwaves of a certain frequency because water absorbs the radiation and this heats it up.
The human body is mostly water but it also has DNA to worry about and one of the side effects of heating water in the human body is DNA damage...And that can lead to Cancer...This is why the extended use of mobile phones, which TX at microwave frequencies, is becoming a cause of concern to many. Ever wondered why your head feels warm when you have been talking on your mobile phone for a while...Well now you know!...Show more →
I think the danger is more of burns, not DNA damage.
I could rewrite your paragraph like so:
'Ever heard of a laser? Some power visible light lasers can really burn you! We should be wary of all sources of visible light due to possible burn/DNA damage. Only turn on the lights in your house in times of absolute need!'
Ionizing radiation is nasty because more or less EVERY collision can ionize the target. In the case of x-rays, gamma rays, etc., it is true that this is a photon/electromagnetic radiation just like visible light and RF. However, visible light and RF aren't ionizing. They can still be nasty because there is some absorption by soft tissues; if there weren't, your body would be transparent to visible light. It's clearly not. Crank up the power on that visible light source enough and it can be quite dangerous, basically through heating. I'm guessing the same could be true for RF sources - I don't have a specific example of that though. That doesn't mean lower power visible light sources or RF sources are dangerous.
Reasonably high power RF sources like a microwave have some pretty simple but very effective safety features that prevent us from harm. The screen in the window, the metal enclosure, and the auto-shutoff when the door is open. Those are all things which you can visible check on before using too, so there's no real worry of frying yourself with a microwave.
A cell phone is a not a high power RF source. ~1/2 watt? Your microwave oven is probably in the neighborhood of 1500 W. Just like a 1/2 watt electrical heater most likely isn't dangerous (if functioning properly), a high power heater in an electric stove could burn you pretty badly.
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