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Why is the sky blue?

  1. Apr 22, 2004 #1
    Simple question...always wondered why it's blue. :rolleyes:
  2. jcsd
  3. Apr 22, 2004 #2


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    Staff Emeritus
    Gold Member

    Because of "Rayleigh scattering".

    i.e., the fact that scattering of light depends on its frequency. Blue light is scattered much more that red light.
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