Question

To an observer on the earth the stars appear to twinkle. This can be ascribed to(a) The fact that stars do not emit light continuously(b) Frequent absorption of star light by their own atmosphere(c) Frequent absorption of star light by the earth's atmosphere(d) The refractive index fluctuations in the earth's atmosphere

Answer 1

Hey !!

To an observer on the earth the stars appear to twinkle. This can be ascribed to ''the refractive index fluctuations in the earth's atmosphere''.

Option (D) The refractive index fluctuations in the earth's atmosphere.

Good luck !!

Answer 2

The answer is (D)

this is due to the continuous change in refractive index of Earth's atmosphere. so the light continuously changes it's path.