Q. If $\ _{i}\mu_{j}\ $represents refractive index when a light ray goes from medium $i$ to medium $j,\ $then the product $\ _{2}\mu_{1} \times \ _{3}\mu_{2} \times \ _{4}\mu_{3}$ is equal to
A) $\ _{3}\mu_{1}$
B) $\ _{3}\mu_{2}$
C) $\frac{1}{\ _{1}\mu_{4}}$
D) $\ _{4}\mu_{2}$
Explanation
(c) $\ _{2}\mu_{1} \times_{3}\mu_{2} \times_{4}\mu_{3} = \frac{\mu_{1}}{\mu_{2}} \times \frac{\mu_{2}}{\mu_{3}} = \frac{\mu_{3}}{\mu_{4}} =_{4}\mu_{1} = \frac{1}{\ _{1}\mu_{4}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.