Why does light bend after refraction?

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Solution

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.

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Similar questions

Why does light refract?

How does the light have to enter the glass : (a) to produce a large amount of bending ? (b) for no refraction to happen ?

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