A converging beam of light is incident o...

A converging beam of light is incident on a right angled isosceles prism as shown in the Figure. The marginal rays in the beam are incident at angle `+- theta`. The refractive index for the glass of the prism is `mu = 1.49 (= (1)/(sin 42°))` . Find the maximum value of `theta` for which no light comes out of the hypotenuse surface.

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The correct Answer is:

`4.47^(@)`

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