Q. A ray of light strikes a glass plate at an angle of$60{^\circ}$. If the reflected an refracted rays are perpendicular to each other, the index of refraction of glass is
A) $\frac{1}{2}$
B) $\sqrt{\frac{3}{2}}$
C) $\frac{3}{2}$
D) $1.732$
Explanation
(d) As reflected and refracted rays are perpendicular to each other, therefore, $i_{p} = i = 60{^\circ}$
$\mu = \tan{i_{p} = \tan{60{^\circ} = \sqrt{3} = 1.732}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.