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![[Post New]](/templates/default/images/icon_minipost_new.gif) 7 May 2008 11:38:56 IST
Accepted Answer [?]
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accoring to rayleigh scaterring law the amount of light scaterred in inversely proportional to to fourth power of the wave lenght of light .
since red light has the longest wave lenght it is less scaterred and hence used in traffic lights
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this reply: 22 points
(with 4 
in 5 votes ) [?]
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