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Author Topic: Why is the sky blue?  (Read 2977 times)

lily

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Why is the sky blue?
« on: 12/02/2011 03:30:02 »
lily  asked the Naked Scientists:
   
Why is the sky blue?

What do you think?
« Last Edit: 12/02/2011 03:30:02 by _system »


 

Offline lightarrow

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Why is the sky blue?
« Reply #1 on: 12/02/2011 20:03:41 »
Sun's light is scattered off air molecules. This scattering increases with the frequency of radiation. So the colours which are in the blue part of the visible spectrum are scattered more. Since, in the visible spectrum of sun's light, violet is much less intense than blue, this last color is the one we see.
 

Offline neilep

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Why is the sky blue?
« Reply #2 on: 13/02/2011 11:29:40 »
...also on my 'painting by numbers ' set..the Sky is is No 2...and No 2 in my set is blue !
 

Offline impukhton

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Why is the sky blue?
« Reply #3 on: 24/02/2011 07:00:05 »
A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light.  When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.

 

The Naked Scientists Forum

Why is the sky blue?
« Reply #3 on: 24/02/2011 07:00:05 »

 

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