An equilateral prism ABC is placed in air with its base side BC lying horizontally along x-axis. A light ray $\sqrt{3} z + x = 10$ is incident at a point P on face AB of the prism.
If the face BC is silvered then net deviation of the finally emerging ray with respect to the incident ray on prism is ( $μ$ of the prism is $\frac{3}{2}$ )

Question

An equilateral prism ABC is placed in air with its base side BC lying horizontally along x-axis. A light ray $\sqrt{3} z + x = 10$ is incident at a point P on face AB of the prism.

If the face BC is silvered then net deviation of the finally emerging ray with respect to the incident ray on prism is ( $μ$ of the prism is $\frac{3}{2}$ )

Infinity Learn · Accepted Answer

Light ray incident normally on the  face AB and falls an angle more than critical angle on AC.When BC in silvered, the light ray reverses its path after reflection at BC normally So,  finally it traverses the path all the way back.

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