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Optical Path Length

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Question

There is an equilateral prism of refractive index 3 on which a light ray is incident normally on one face as shown in the figure. Find the length of the path travelled by the light ray inside the prism.

A

\sqrt{3} \frac{L}{2}

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B

\sqrt{3} L

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C

\frac{3 L}{2}

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D

L

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Solution

The correct option is A $\sqrt{3} \frac{L}{2}$
$\sqrt{3} \frac{L}{2}$

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