Question

Light is incident on a prism with an equilateral triangular cross-section, making an angle of θ w.r.t the normal as shown in the figure. The index of refraction of the prism is 3​2​. If the angle θ starts at 60∘ and is gradually made smaller until no light exist from side BC, the final value of θ in degrees is


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Answer 1

Explanation:

Light is incident on a prism with an equilateral triangular cross-section, making an angle of θ w.r.t the normal as shown in the figure. The index of refraction of the prism is 32. If the angle θ starts at 60∘ and is gradually made smaller until no light exist from side BC, the final value of θ in degrees is