Q.

The blue color of the sky is due to:

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a

Refraction of light.

b

Dispersion of light

c

Diffraction of light

d

Scattering of light 

answer is D.

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Detailed Solution

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When the sunlight enters the earth’s atmosphere it gets scattered due to air molecules present in the atmosphere. Sunlight is made up of seven lights, where a few colors have longer wavelengths like red and orange, and others have shorter wavelengths like blue and violet. But lights with shorter wavelengths gets scattered  the most because of the air molecules, so blue gets scattered  the most, and colors like red do not gets scattered . Wherever we look, blue light falls on our eyes after getting scattered from the atmosphere, so we feel the sky’s color as blue.
  
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