Q. The wavelength of light in air and some other medium are respectively $\lambda_{a}$ and $\lambda_{m}$. The refractive index of medium is
A) $\lambda_{a}/\lambda_{m}$
B) $\lambda_{m}/\lambda_{a}$
C) $\lambda_{a} \times \lambda_{m}$
D) None of these
Explanation
(a) $\mu_{m} = \frac{c}{v} = \frac{n\lambda_{a}}{n\lambda_{m}} = \frac{\lambda_{a}}{\lambda_{m}}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.