Q. For total internal reflection to take place, the angle of incidence $i$ and the refractive index $\mu$ of the medium must satisfy the inequality
A) $\frac{1}{\sin i} < \mu$
B) $\frac{1}{\sin i} > \mu$
C) $\sin i < \mu$
D) $\sin i > \mu$
Explanation
(a) For total internal reflection $i > C$
$\Rightarrow \sin C > \sin C \Rightarrow \sin i > \frac{1}{\mu} \Rightarrow \frac{1}{\sin i} < \mu$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.