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Q.

Stars appear to be higher in the sky than actually they are because of______.

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a

Scattering of light

b

Dispersion of light

c

Atmospheric reflection

d

Atmospheric refraction

answer is D.

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Detailed Solution

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  • Due to atmospheric refraction, the stars appear to be higher in the sky than they actually are. 
  • As the density of the atmosphere's layers increases downward, the light rays from stars are refracted by the atmosphere as they move from a rarer to a denser medium. 
  • As a result, at each layer, they incline toward the normal. The star's light appears to come from a location that is higher than the star because of continual refraction.
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