Q. When a ray of light enters a glass slab from air
A) Its wavelength decreases
B) Its wavelength increases
C) Its frequency increases
D) Neither its wavelength nor its frequency changes
Explanation
(a) $\mu \propto \frac{1}{\lambda}$
$\mu_{water} < \mu$
$\therefore\lambda_{domer} < \lambda_{water}$
$ie,$ wavelength decreases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.