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A ray of light from a denser medium stri...

A ray of light from a denser medium strikes a rarer medium at an angle of incidence I (see figure ). The reflected and refracted rays make an angle of `90^(@)` with each other. The angles of reflection and refraction are r and `r^(')` . The critical angle is

A

`sin^(-1) (sin r)`

B

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

C

`sin^(-1) (tan i)`

D

`tan^(-1) (sin i)`

Text Solution

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The correct Answer is:
c
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