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2015-02-17T13:32:53+05:30

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Due to the refraction of light by the various layers of the atmosphere, the stars appear to twinkle or shine at night.
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Yes,propagation of light is different in different medium depending on the density of medium.... So light refracts. As light refracts through different layers of atmosphere... Stars shine and twinkle at night
2015-02-17T13:32:58+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
In fact, stars always keep shining. We only do not see them as they are hidden from sight in the day because of the brighter rays from the sun which is closer to the earth.

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