Q. The maximum refractive index of a prism which permits the passage of light through it, when the refracting angle of the prism is $90{^\circ},$is
A) $\sqrt{3}$
B) $\sqrt{2}$
C) $\frac{\sqrt{3}}{2}$
D) $\frac{3}{2}$
Explanation
(b) For passing the ray from prism,
$\mu < cosec\frac{A}{2}$
$\mu < cosec\left( \frac{90{^\circ}}{2} \right)$
$\mu < \sqrt{2}$
$\mu_{\max}{= \sqrt{2}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.