Why does the sky appear blue to human observers during daytime?

Question

Why does the sky appear blue to human observers during daytime? — Exam MCQ

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C. Blue light is scattered more than red light due to its shorter wavelength — The correct choice is Blue light is scattered more than red light due to its shorter wavelength. The relationship between wave speed, frequency and wavelength explains the result.

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A. Blue light is absorbed and re-emitted by atmospheric particles

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B. All wavelengths are scattered equally in the atmosphere

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D. Red light is scattered more than blue light due to its longer wavelength

Why does the sky appear blue to human observers during daytime?

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