Q. In Young’s double-slit experiment the fringe width is $\beta$. If entire arrangement is placed in a liquid of refractive index $n$, the fringe width becomes
A) $\frac{\beta}{n + 1}$
B) $n\beta$
C) $\frac{\beta}{n}$
D) $\frac{\beta}{n - 1}$
Explanation
(c) $\beta \neq \frac{\lambda D}{d}$ and $\lambda \propto \frac{1}{\mu}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.