Q. Monochromatic light is refracted from air into the glass of refractive index $\mu$. The ratio of the wavelength of incident and refracted waves is
A) $1\ :\mu$
B) $1\ :\mu^{2}$
C) $\mu\ :1$
D) $1\ :1$
Explanation
(c) $\lambda \propto \frac{1}{\mu} \Rightarrow \frac{\lambda_{1}}{\lambda_{2}} = \frac{\mu_{2}}{\mu_{1}} = \frac{\mu}{1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.