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Question : 24
Total: 36
What is atmospheric refraction? Use this phenomenon to explain the following natural events.
(a) Twinkling of stars
(b) Advanced sun-rise and delayed sunset.
Draw diagrams to illustrate your answers.
(a) Twinkling of stars
(b) Advanced sun-rise and delayed sunset.
Draw diagrams to illustrate your answers.
Solution:
Atmospheric refraction : Refraction of light caused by the earth's atmosphere due to change in the refractive indices of different layers.
(a) Twinkling of Stars : Stars are distant point sized source of light. The path of the rays of light coming from the star goes on varying due to atmospheric refraction. Thus apparent position of the stars fluctuates and the amount of star light entering the eye flickers giving the twinkling effect.
(a) Twinkling of Stars : Stars are distant point sized source of light. The path of the rays of light coming from the star goes on varying due to atmospheric refraction. Thus apparent position of the stars fluctuates and the amount of star light entering the eye flickers giving the twinkling effect.
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