Explain with help of a labelled diagram, the cause of twinkling of stars.(Delhi - 2014)
Answers
stars and their own light twinkle due to the atmospheric refraction of light stars are very far away from the Earth when the light coming from the stars interest that atmosphere it gets reflected at different levels because of variation in the air density at different levels of atmosphere when the stars and reflected by atmosphere comes Motu versus it appears brighter than when it is come plus two hours before it appears as a stars are twinkling at night
Explanation:
Twinkling of stars is due to atmospheric refraction of star light. The star light after entering the earth’s atmosphere undergoes refraction in a continuous manner before it reaches the Earth. The atmospheric refraction is due to change in the refractive index at different level in atmosphere. The star light bends towards the normal, the apparent position is different from the actual position of star. Since atmosphere is not stationary and keeps changing. As path of rays of light coming from star varies slightly then the apparent position of star also varies slightly and the amount of light entering the eye flickers. Sometimes, it is brighter and sometimes the star seems fainter. In this way, stars twinkle.
