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Q.

Twinkling of the stars is due to the atmospheric ____________?


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a

dispersion of light by water droplets

b

refraction of light by different layers of varying refractive indices

c

scattering of light by dust particles

d

internal reflection of light by clouds 

answer is B.

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Detailed Solution

Twinkling of the stars is due to the atmospheric refraction of light by different layers of varying refractive indices.
The twinkling of stars is due to atmospheric refraction caused by the gradual change in the refractive index of different air layers at different heights. The apparent location of the star keeps on changing. Thus, the twinkling effect is due to the refraction of light.
 
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