Question

the sun can be seen two minutes before actual sunrise and two minutes after the actual sunset

Answer 1

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The sun can be seen two minutes before actual sunrise and two minutes after the actual sunset.
It is because of ' atmospheric refraction '
Because of this refraction , when sun get actually sets or sun were before the get rise... we can see it late and early as apparent position of sun ... we know our atmosphere contains dust particles and have different layers with different density... So the light of sun get refracted...

And it will be seen two minutes early or after .....

Hope it helps

Answer 2

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1. The earth is surrounded by an atmosphere which is denser near the surface of the earth.

2. When the rays of light from the Sun enter the earth's atmosphere from outer space, they travel from a rarer medium to a denser medium.

3. Hence, they bend towards the normal on refraction.

4. Hence, even when th sun is below the horizon while rising or setting, its rays reach is due to refraction and it appears to be on the horizon.

Therefore, the sun can be seen two minutes before actual sunrise and two minutes after the acutal sunset.

Hope it helps!

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