GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Stars twinkle because
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the intensity of light emitted by them changes with time
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the distance of the stars from the earth changes with time
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the light from the star is scattered by the dust particles and air molecules in the earth’s atmosphere
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the refractive index of the different layers of the earth’s atmosphere changes continuously, consequently the position of the image of a start changes with time
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Explanation:
Detailed explanation-1: -Light from the star, on passing through the atmosphere is refracted at different amounts by different layers. And because of the continuously changing conditions of the atmosphere, the path of light also fluctuates constantly, causing the image of the star to twinkle. Therefore, the correct choice is option (c).
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