Question

Explain atmospheric refraction . what do stars twinkle?

Answer 1

Answer:

Refraction of light through different layers of atmosphere is k/as atmospheric refraction.

Stars twinkle because the light of stars before reaching the earth surface has to cross different layers of atmosphere...and gets bend...so it appears to twinkle.

Answer 2

Explanation:

Stars are so far from us and they became a point source for us. refractive index of atmosphere keeps changing. Lights do not travel in a straight line.