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The refractive index of the core of an o...

The refractive index of the core of an optical fibre is `mu_(2)` and that of the cladding is `mu_(1)`. The angle of incidence on the face of the core of that the light ray just under goes total internal reflection at the cladding is

A

`sin^(-1)((mu_(1))/(mu_(2)))`

B

`sin^(-1) sqrt(mu_(2)^(2)-mu_(1)^(2))`

C

`sin^(-1)sqrt(mu_(2)-mu_(1))`

D

`sin^(-1)sqrt(mu_(1)^(2)+mu_(2)^(2))`

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-GEOMETRICAL OPTICS-LECTURE SHEET (EXERCISE II LEVEL -I (MAIN) STRAIGHT OBJECTIVE TYPE QUESTIONS)
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