Q. One side of a glass slab is silvered as shown. A ray of light is incident on the other side at angle of incidence $i = 45{^\circ}$. Refractive index of glass is given as 1.5. the deviation of the ray of light from its initial path when it comes out of the slab is
A) $90{^\circ}$
B) $180{^\circ}$
C) $120{^\circ}$
D) $45{^\circ}$
Explanation
(a) From the figure it is clear that the angle between incident ray and emergent ray is $90{^\circ}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.