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To an observer on the earth the stars ap...

To an observer on the earth the stars appear to twinkle. This can be ascribed to

A

the fact that stars do not emit light continuously

B

frequency absorption of star light by their own atmosphere

C

frequency absorpton of star light by the earth's atmosphere

D

the refractive index fluctuations in the earth's atmosphere

Text Solution

Verified by Experts

The correct Answer is:
D
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(a) Give reasons for the following: (i) The sky appears to be blue during day time to a person on earth. (ii) The sky near the horizon appears to have a reddish hue at the time of sunset and sunrise. (iii) The sky appears dark instead of blue to an astronaut. (iv) The stars appear to twinkle. (v) The planets do not twinkle.

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