Which among the following is the cause for twinkling of stars?

Atmospheric refraction

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Reflection

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Persistence of vision

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None of these

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Solution

The correct option is A Atmospheric refraction
Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height.This refraction is due to the velocity of light through air, decreasing with increased density.Twinkling of stars is due to the atmospheric refraction.

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