A ray of light falls perpendicularly on the face of a right triangular prism as shown in the figure. If the total deviation suffered by the ray in degrees is $δ$ . Find $\frac{δ}{100}$ .
(Refractive index of prism material is 5/3. )

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answer is 1.27.

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Detailed Solution

At point A
μ sinθ > 1 Hence total internal reflection will take place
At point B
μsin $θ_{1}$ = 1. Therefore light ray will graze the surface
hence δ = 127°
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