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  1. Oxford American Dictionary

    Rayleigh scattering

    • IPA[ˈrālē ˈskad(ə)riNG]
    • n.
      the scattering of light by particles in a medium, without change in wavelength. It accounts, for example, for the blue color of the sky, since blue light is scattered slightly more efficiently than red.

    • noun: Rayleigh scattering