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Question

When light enters from medium P to medium Q, it is given that the value of sin isin r is less than 1, where i and r are the angle of incidence and refraction respectively. This means that:


A

P is optically denser than Q

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B

Q is optically denser than P

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C

P and Q have same optical density

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D

P and Q are opaque.

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Solution

The correct option is A

P is optically denser than Q


Given: (sin isin r) < 1

sin i < sin r
Angle of incidence < Angle of refraction.

It means that when light ray travels from medium P to medium Q, the ray bends away from the normal.

We know that when light ray travels from denser to rarer medium, it bends away from the normal.

Hence, medium P is optically denser than Q.


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