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#1
February 20th 04, 12:55 AM
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On Wed, 18 Feb 2004 at 22:16:27 in message
%uRYb.353608$na.522124@attbi_s04, Jay Honeck wrote: I've never heard of anyone frying their retinas by looking at a radio transmitter, but this begs the question: Can the lens in your eye focus radio waves? No, Firstly the transparency of materials to EM radiation varies with frequency. Secondly the wavelength of the transmissions is very large compared to the lens in your eye. A 3GHz transmission has a wavelength of 10cm.Red light, the longest wavelength of visible light has a wavelength of about 1 micron (! millionth of a metre). E&OE -- David CL Francis 
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