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The sky is blue because at most (steep) angles during the day, the sun's light refracts(splits out) blue light. During sunsets when the angle is steeper, red light is refracted more, hence red sunsets.
Edited to say:
Sorry, I got the mechanism wrong, it's technically Rayleigh or coherent scatter (yes, there is an incoherent scatter called Compton scatter.
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"Of all tyrannies, a tyranny exercised for the good of its victims may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end, for they do so with the approval of their own conscience." – C. S. Lewis
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Last edited by Lebell; 10-04-2003 at 01:25 AM..
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