Q.
A ray of light passes through four transparent medium with refractive indices $\mu_{1},\mu_{2},\mu_{3}$and $\mu_{4}$ as shown in the figure. The surfaces of all media are parallel. If the emergent ray $CD$ is parallel to the incident ray AB. We must have
A) $\mu_{1} = \mu_{2}$
B) $\mu_{2} = \mu_{3}$
C) $\mu_{3} = \mu_{4}$
D) $\mu_{3} = \mu_{1}$
Explanation
(a) As there is no deflection between medium 1 and 2. Therefore, $\mu_{1} = \mu_{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.