• Question: why is the sky blue

    Asked by 528prtb26 to Michele on 16 Mar 2015.
    • Photo: Michele Faucci Giannelli

      Michele Faucci Giannelli answered on 16 Mar 2015:

      This is due to Rayleigh scattering. Due to the thickness of the atmosphere the blue component of the light is the main component that is deflected to reach us. During the evening, the light need to pass through more atmosphere so the red component is the prominent one.
      For a full explanation and all the math, I suggest this link: http://en.wikipedia.org/wiki/Rayleigh_scattering

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