Question

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⚫Question:-⚫

⏩Why do star twinkle at night?
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Answer 1

Answer:

Due to recreation of light

Explanation:

We know that star is a point object. Light from stars have to travelled a long distance. when light enters in earth's atmosphere it gets refracted many time due to change in density of atmosphere. Due to this refraction light keep changing its path and stars keep changing its apparent position and keep fluturating. Due to this some time stars looks brighter. This phenomena makes the stars that they are twinkling.

Refrection :

when light change it's medium there is a bend in light. This phenomena is called refrection of light

Answer 2

Explanation:

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Stars are self luminous and can be seen only at night in absence of sunlight ! They appear to be point sources because of their being at very large distance from us ! As density of air increase with lowering height above surface of Earth ! Stars light coming towards us travel from rarer to denser medium as it constantly bends towards normal ! This makes star appear yo be higher in sky ...!

Apparent position of stars keep changing a bit ...! this is because motion of atmospheric air & changing air density & temperature ! Because of this ; Refractive index of keeps changing ; Because of this change , the position & brightness of star keep changing continuously ...! This makes stars to be twinkling at night .....!