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A light ray is incident by grazing one o...

A light ray is incident by grazing one of the face of a prism and after refraction ray does not emerge out, what should be the angle of prism while critical angle is `C` ?

A

Equal to `2C`

B

Less than `2C`

C

More than `2C`

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
C
From any diagram
`A=C+theta` for TIR at `AC`
`thetagtC` so`AgtAC`
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