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Name the phen...

Question

Name the phenomenon that causes the stars to twinkle on a clear sky.

A

All of these

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B

Atmospheric refraction

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C

Dispersion of light

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D

Reflection of light

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Solution

The correct option is B Atmospheric refraction
Twinkling of stars is due to atmospheric refraction of starlight. Light from the stars, upon entering the Earth's surface, undergo refraction continuously before reaching our eyes.

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Similar questions

Q. 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.

Q. Name the phenomenon that causes twinkling of the star on a clear sky.

Q. (a) What is atmospheric refraction? What causes atmospheric refraction?
(b) Why do stars twinkle on a clear night?
(c) Explain why, the planets do not twinkle at night.

Q. Match the columns

$A$	$B$
(1) Stars	(a) Pollution free
(2) Objects in the sky	(b) Do not twinkle
(3) Planets	(c) Twinkling bodies
(4) Clear sky	(d) Celestial bodies

Q. Suggest reasons for the phenomenon associated with the following.
(i) The sky appearing blue
(ii) Twinkling of stars

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