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SAQ : Why does the sky look blue?

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Question

Why does the sky look blue?

Answer

The sky looks blue due to the scattering of sunlight by the molecules of the atmosphere. When sunlight passes through the atmosphere, then nitrogen and oxygen molecules present in the atmosphere absorb a part of sunlight and re-emit it. As the wavelength of the blue colour is shorter, it scatters more than any other colour light. Hence the sky looks blue.

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