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Why do stars appear twinkling ? |
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Answer» (i) Starts appear to be twinkling due to atmospheric refraction. (ii) Star light reaches the surface of the earth through many layers of atmosphere. (iii) These layers have different optical densities due to which they offer different refractive index values to the incoming light. (iv) So, the light bends many times giving different apparent positions of the star which we see as twinkling. |
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