• Question: Why is the sky blue?

    Asked by higglebiggle to David, Luna, Mark, Probash on 23 Mar 2011 in Categories: . This question was also asked by hollywoodundead.
    • Photo: David Pyle

      David Pyle answered on 23 Mar 2011:

      From light scattering in the atmosphere. In the late 1800s, Rayleigh worked out that the anount of scattering was proportional to the fourth power of (1/wavelength). So short wavelengths of light (at the blue end of the spectrum) are scattered more by molecules in the atmosphere than long wavelengths. This effect can account for the blue skies overhead.

    • Photo: Luna Munoz

      Luna Munoz answered on 23 Mar 2011:

      A mixture of the gas molecules, I think.

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