What is the cause of twinkling of stars?
(a) Dispersion
(b) Reflection
(c) Atmospheric refraction
(d) Accommodation
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Answer:
The correct one is Atmospheric refraction
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The twinkling of a star is due to atmospheric refraction of starlight. The starlight, on entering the earth's atmosphere, undergoes refraction continuously before it reaches the earth. ... Since the stars are very distant, they approximate point-sized sources of light.
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