Stars are twinkling due to

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(C) The twinkling of stars is caused by the atmospheric refraction of starlight.As starlight enters the Earth's atmosphere,it undergoes continuous ref

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Refraction

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(C) The twinkling of stars is caused by the atmospheric refraction of starlight.As starlight enters the Earth's atmosphere,it undergoes continuous refraction due to the changing refractive index of the different layers of air.These layers have varying temperatures and densities,which cause the light to bend along a curved path.Because the atmosphere is turbulent and constantly moving,the amount of light reaching the observer's eye fluctuates,resulting in the apparent twinkling effect.

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