Question

We know that light refracts (or bends) when it goes from one medium to another. Now, the atmosphere contains only air. Then how does light get refracted on passing through only air in the atmosphere?

Answer 1

Explanation:

The bending occurs because light travels more slowly in a denser medium. ... As the light enters the water, it is refracted. Since the light is passing from air (less dense) into water (more dense), it is bent towards the normal. The beam of light would appear to bend at the surface of the water.

Answer 2

Explanation:

our atmosphere also contains water in the form of moisture other than air so air is the rarer medium, water is the denser medium so the light refracts in the atmosphere

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