First slide

Ray optics

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 $μ$ for the prism is $\frac{3}{2}$ , then net deviation of the ray as it emerges out of the prism is

Difficult

A

$60^{o}$
B

$30^{o}$
C

$90^{o}$
D

$180^{o}$

Solution

For $μ = \frac{3}{2},$ total internal reflection takes place at AC. From geometry, it in clear that ray
in perpendicular incident on BC, so net deviation = $180^{o} - 120^{o} = 60^{o},$ only at AC.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App