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A ray of light incident parallel to the ...

A ray of light incident parallel to the base PQ of an isosceles right-angled triangle prism PQR suffers successive total internal reflections at the faces PQ and QR before emerging reversed in direction shown.

If the refractive index of the material of the prism is `mu`, then

A

`mu gt sqrt(2)`

B

`sqrt(3) lt mu lt sqrt(5)`

C

`sqrt(2) lt mu lt sqrt(3)`

D

`mu lt sqrt(2)`

Text Solution

Verified by Experts

The correct Answer is:
A

`90 gt 2C`
`because mu gt sqrt(2)`.
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