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polarization of the sky


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The polarization of sunlight caused by scattering (more specifically, Rayleigh scattering) by molecules in the atmosphere. This polarization reaches a maximum 90° from the Sun. There are three neutral points at which no polarization is present. These are Arago's point, 20° above the antisolar point;Babinet's point, 20° above the Sun; and Brewster's point, 20° below the Sun. See also haidinger's brush.

Subjects: Meteorology and Climatology.


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