Question

Retraction of light by the earth atmosphere due to variation in an
(i) Atmospheric reflection
(ii)Atmospheric dispersion
(iii)Atmospheric scattering
(iv)Atmospheric refraction
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Answer 1

Answer:

I think answer is atmospheric refraction

Answer 2

The correct option is (iv) Atmospheric Refration.

For examples, Twinkling of stars, large appearence of sun during sunrise and sunset, reddish colour of sun during sunrise and sunset, etc.