davidsperling
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Are there any health concerns with WiFi & 3G etc?
Science only, please ;)
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A simple way of looking at it is that 2.4GHz waves have a wavelength of 12.5 centimeters. In order for radio antennas to pick up radio waves, they have to be at least a reasonable fraction of the size of the wavelength, like 1/4 or so. So to pick up 2.4GHz waves you need an antenna at least 4cm long.
All the mechanisms of biological damage that people are talking about, bond breakage, dna mutation, etc., happen on scales that are at least 5 orders of magnitude smaller than that.
Say you're in the ocean, assume you have a size of about 1 meter. A wave with a wavelength of 100000 meters passes by you. That's so slow and spread-out that you're not going to even notice it.
Here's another Wikipedia page that is highly relevant: http://en.wikipedia.org/wiki/Hypochondria
All the mechanisms of biological damage that people are talking about, bond breakage, dna mutation, etc., happen on scales that are at least 5 orders of magnitude smaller than that.
Say you're in the ocean, assume you have a size of about 1 meter. A wave with a wavelength of 100000 meters passes by you. That's so slow and spread-out that you're not going to even notice it.
Here's another Wikipedia page that is highly relevant: http://en.wikipedia.org/wiki/Hypochondria
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http://www.wifiinschools.org.uk/6.html
(linked from your link)