# Refraction of light

An isosceles prism of angle 120* has a refractive index 1.44.Two parallel monochromatic rays enter the prism parallel to each other as shown in figure.the ray emerge from the opposite faces-
(A)Are parallel to each other
(B)are diverging
(C) make an angle 2[sin^ -1(0.72)-30*] with each other
(D) make an angle 2 sin^ -1(0.72) with each other

The figure for the following question is attached .

The possible eqn. are Refractive index=Sin i/Sin r

It is one of the MCQ in my question paper, But I am unable to solve it.Since the rays fall normal to the surface of the prism, so they should go undeviated but what after they strikes the next prism surface ,How will they deviate?

Only thing i am able to do is that they will enter the prism without any deviation since it is perpendicular to the surface of the prism but what after that?

Thank you,
Harsh

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