Q. The refractive index of the material of a glass prism is $\sqrt3$. The angle of minimum deviation is equal to the angle of the prism. What is the angle of the prism?
A) $60^\circ$
B) $58^\circ$
C) $48^\circ$
D) $50^\circ$
Explanation
[Solution by Dr. Abubacker] $\mu=\frac{\sin\frac{A+\delta}2}{\sin\frac A2}$ with $\delta=A$ gives $\mu=\frac{\sin A}{\sin\frac A2}=2\cos\frac A2=\sqrt3$. So $\frac A2=30^\circ$ and $A=60^\circ$. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.