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The critical angle between and equilater...

The critical angle between and equilateral prism and air is `45^(@)`. If the incident ray is perpendicular to the refracting surface, then

A

After deviation it will emerge from the second refracting surface

B

It is totally reflected on the second surface and emerges out perpendicularly from third surface in air

C

It is totally reflected from the second and third refracting surfaces and finally emerges out from the first surface

D

It is totally reflected from all the three sides of prism and never emerges out

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The correct Answer is:
b
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