JEE Main & Advanced
Physics
Ray Optics
Question Bank
Refraction of Light at Plane Surfaces
question_answer
On a glass plate a light wave is incident at an angle of \[60{}^\circ \]. If the reflected and the refracted waves are mutually perpendicular, the refractive index of material is [MP PMT 1994; Haryana CEE 1996; KCET 1994; 2000]
A)\[\frac{\sqrt{3}}{2}\]
B)\[\sqrt{3}\]
C)\[\frac{3}{2}\]
D)\[\frac{1}{\sqrt{3}}\]
Correct Answer:
B
Solution :
From figure
\[<i={{60}^{o}},\]\[<r={{30}^{o}}\]
so \[\mu =\frac{\sin 60}{\sin 30}=\sqrt{3}\]