Question

why star is twinkling at night? Explain in 35 - 55 words

Answer 1

Star twinkle at night because the star light reaching our eye increased and decreased continuously due to the atmospheric refraction.when the starlight reaching our eyes increase, the star looks bright and when the star light reaching our eyes decrease,thestar looks dim. that's why the star shine at night.

Answer 2

The stars an approximate point -sized source of light as they are very distant.As the path of rays of light coming from the stars goes on wearing slightly, due to the varying refractive indices of different layers of the atmosphere the Apparent position of the stars and the intensity of light from the star reaching our eyes both fluctuate constantly. As a result at one moment, the star appears to be very bright and the next moment, it becomes very faint .this leads to the twinkling effect