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blue sky

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dave107 | 22:58 Mon 06th Oct 2008 | Weather
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where is the blue sky?? and where does it go at night??
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next weather or not to.....
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Avatar Image Azalian
The sky is blue because sunlight entering the upper atmosphere collides with oxygen and nitrogen molecules.
The colours in the spectrum which have the shortest wavelenghts are scattered most by these collisions,that is blue and violet.

23:31 Thu 23rd Oct 2008
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And there is no sunlight at night to scatter!!
23:32 Thu 23rd Oct 2008

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