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Which of the following scattering phenomena is responsible for the blue colour of the sky?

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Which of the following scattering phenomena is responsible for the blue colour of the sky?

(a) Mie scattering

(b) Diffraction

(c) Rayleigh scattering

(d) All of the mentioned

This question was addressed to me in an interview.

This interesting question is from Aerosols topic in chapter Particulates, Acid Rain & Aerosols of Environmental Engineering

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The correct answer is (c) Rayleigh scattering

The explanation: Due to Rayleigh’s scattering shorter wavelength radiations are scattered more, and hence makes the sky appear blue.

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