A ray of light incident paralled to the base $P Q$ of an isosceles right-angled triangular prism $P Q R$ suffers two successive total internal reflections at the faces $P Q$ and $Q R$ before emerging reversed in direction as shown.
If the refravtive index of the material of the prism is $μ$ , then

μ > \sqrt{5}

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\sqrt{3} < μ < \sqrt{5}

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\sqrt{2} < μ \sqrt{5}

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μ < \sqrt{2}

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Solution

The correct option is C $μ > \sqrt{5}$

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