Question

Explain why sun appears elliptical during sunset according to refraction

Answer 1

It was because of horizon that makes sun elliptical during his appearance on earth.

Answer 2

this is because of atmospheric refraction

Earth's atmosphere is thin at the top and dense at the bottom

so, light travels faster in thin air than in dense air

so, the sun is raised upwards

the refracted light reaches our eyes and we see an elliptical sun at the horizon

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