Question

How do we say a medium to be rarer or denser? Give two reasons.

Answer 1

Answer:

rarer means which have less refractive index comparative to other side.

and denser means medium have more refractive index comparative to other side.

Explanation:

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Answer 2

A medium ‘A’ is said to be optically denser than medium ‘B’, if the speed of light in ‘A’ is lesser than the speed of light in ‘B’ i.e the refractive index of ‘A’ is greater than the refractive index of ‘B’.
A medium ‘A’ is said to be optically rarer than the medium ‘B’, if the speed of light in ‘A’ is greater than the speed of light in ‘B’ i.e the refractive index of ‘A’ is lesser than the refractive index of ‘B’.



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