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Atmospheric Refraction

The twinkling...

Question

The twinkling of stars is due to atmospheric :
(a) reflection of light (b) dispersion of light
(c) interference of light (d) refraction of light

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Solution

Answer : (d) refraction of light. ie; Atmospheric refraction of light

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Q. Question 6
Twinkling of stars is due to atmospheric

(a) dispersion of light by water droplets
(b) refraction of light by different layers of varying refractive indices
(c) scattering of light by dust particles
(d) internal reflection of light by clouds

Q. Match the following :

LIST I	LIST II
A) Rainbow	1) Scattering of light
B) Twinkling of stars	2) Dispersion of light
C) Blue colour of sky	3) Fluctuation of the refraction index in atmosphere layers
D) Advancement of sunrise and delay of sunset	4) Refraction of light

Q. The atmospheric refraction of light causes the twinkling of :
(a) planets only (b) stars only
(c) planets and stars (d) stars and satellites

Q. The blue colour of sky is due to:
(a) refraction of light
(b) dispersion of light
(c) diffraction of light
(d) scattering of light

Q. Assertion :The twinkling of star is due to reflection of light. Reason: The velocity of light changes while going from one medium to the other.

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