why do stars twinkle
Answers
The twinkling of a star is due to atmospheric refraction of starlight. The starlight, on entering the earth’s atmosphere, undergoes refraction continuously before it reaches the earth. The atmospheric refraction occurs in a medium of gradually changing refractive index.
Answer:
th twinkling of the stars is due to the atmospheric refraction.Light emitted by the stars passes through the different layers of the atmosphere before reaching our eyes.the layer which is near to the sun and stars is rarer and the layer which is nearer to the earth surface is denser .So as the light passes through the upper most layer it bends towards the normal as it enters the next layer.This continuous process gives rise to the apparent position of the star which changes continuously and thus leads to the twinkling of the star