Question

Under minimum deviation condition in a prism, if a ray is incident at an angle ${30}^0$, the angle between the emergent ray and the second refracting surface of the prism is:

• A. $0^0$
• B. ${30}^0$
• C. ${45}^0$
• D. ${60}^0$

Answer 1

The correct option is D ${60}^0$

Incident angle, $\angle i={30}^0$.

Under minimum deviation condition in a prism, the angle between the emergent ray and the second refracting surface of the prism is: $2\angle i=2\times {30}^0={60}^0$