Question

What is meant by a light ray travelling in a medium

Answer 1

When light rays travelling from one medium fall at the surface of another medium part of the light rays returns back to the same medium.

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Answer 2

Explanation:

Refraction of Light: as it passes from less dense to more dense mediums. When light passes from a less dense to a more dense substance, (for example passing from air into water), the light is refracted (or bent) towards the normal. ... The bending occurs because light travels more slowly in a denser medium.

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