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Mirror Formula Formal Proof

A light ray e...

Question

A light ray enters from medium A to medium B as shown in figure. Comment on the refractive index of medium B with respect to refractive index of medium A .

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Solution

Clearly, the ray in medium B is moving towards normal when it enters from medium A. Hence, medium B is optically denser than medium A. This means that the refractive index of medium B with respect to refractive index of medium A will be greater than 1.

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