1.

If the critical angle for the material of a prism is C and the angle of the prism is A, then there will be no emergent ray when

Answer»

after deviation it will emerge from the second refacting surface
it is totally REFLECTED on the second surface and emeges out perpendicularly from third surface in AIR .
it is totally reflected from the second and third REFRACTING surface and finally emerges out from the first surface
it is totally reflected from all the three sides of prism and NEVER emerges out

Answer :B


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