Physics · Optics

Stars twinkle in the night sky primarily due to:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1Rapid change in the distance of stars from the Earth.
2Periodic variation in the actual light intensity emitted by stars.
3Continuous rotational motion of the Earth.
4Fluctuations in atmospheric refraction caused by varying air density and refractive index.✓

Correct answer

Fluctuations in atmospheric refraction caused by varying air density and refractive index.

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