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In figure, the reflected ray B makes an ...

In figure, the reflected ray B makes an angle `90^@` with the ray C. If I,`r_1 and r_2` are the angles of incidence, reflection and refraction, respectively. Then, the critical angle of the medium is

A

`sin^(-1)[tan r]`

B

`sin^(-1)[cot r]`

C

`sin^(-1)[tan r']`

D

`sin^(-1)[sin r']`

Text Solution

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The correct Answer is:
A
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