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Two identical thin isosceles prims of re...

Two identical thin isosceles prims of refracting angle `theta` and refractive index `mu` are placed with their bases touching each other. A parallel beam , of width 2b, is incident on this system , as shown. The distance of the point of convergence from the prism is

A

`b/((mu-1)theta)`

B

`b/(2(mu-1)theta)`

C

`(2b)/((mu-1)theta)`

D

`(btheta)/((mu-1)theta)`

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The correct Answer is:
A
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