Quote:
Originally Posted by Cinisajoy
Question: Is this just electric stoves or gas stoves too?
Interesting discussion on radiation. Thanks for the information.
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It is anything that emits photons (including electric and gas stoves), with the exception of out-of-phase coupled photos emitted from an EM-drive engine (non-EM in that state, when they pass invisibly through metal, providing the impetus required by Newton's third law). All photons are "electromagnetic", and streams or waves of them correspond to broadband or narrow-band radio transmissions. Anything at a temperature above absolute zero emits photons, with a frequency (and energy) determined by temperature. Sometimes the emitted frequencies are in the range visible to the human eye (including a campfire, at such a high amplitude you can feel it on your skin -- especially noticeable if you take your glasses off while sitting near a campfire).
Wifi is broadband (but much less so than sunlight). Individual photons of high enough energy/frequency (ionizing radiation such as shortwave ultraviolet, or x-ray) can damage DNA (e.g. sunburn). But what we call radio (including wifi and 3G) are way low in the non-ionizing spectrum, and cause no such physical damage. However, some anecdotal evidence studies suggest that continuous exposure to certain EM frequencies (such as under 50/60-Hz high-tension powerlines) affect plant growth (increase it) and may also alter or stimulate unwanted biological activity in mammals due to resonating molecules of corresponding size. Such things are more pseudoscience than science, until proven otherwise, but not necessarily impossible.
However, taking it all into perspective, yeah, sunlight. Essential to terrestrial life (but not hydrothermal life). But bathing in sunlight requires sunscreen and/or temporal moderation. I think we are safe with wifi (which uses a frequency that merely causes heating, the same frequency as microwave ovens, but at a drastically reduced power level).