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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:
B
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