Question

10. Why do stars twinkle?

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Answer 1

Answer:

The twinkling of stars is due to atmospheric refraction of star-light. The atmosphere is made of several layers and the refractive indices which keep on changing continuously due to this path of light rays from the star keep on changing their path continuously. As a consequence the number of rays entering, the pupil of the eye goes on changing with time and the stars appear twinkling.

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Answer 2

Answer:

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Explanation:

Stars appear to Twinkle due to atmospheric refraction. The light of star after the entry in the earth's atmosphere undergoes refraction continuously, till it reaches the surface of the earth.Stars are far away.so they are the point source of light. As the path of light coming from stars keep changing, thus the Apparent position of stars keep changing and the amount of light from stars entering the eye keeps twinkling. Due to which a star sometimes appear bright and sometimes dim, which is the effect of twinkling.