Question

In a Young's double-slit experiment, the fringe width is $\beta$. If the entire arrangement is now placed inside a liquid of refractive index$\mu$, the fringe width will become

• A. $\mu \beta$
• B. $\frac{\beta }{\mu }$
• C. $\frac{\beta }{\mu +1}$
• D. $\frac{\beta }{\mu -1}$

Answer 1

Answer: (B)

$\frac{\beta }{\mu }$

the fringe width $\alpha$ $\lambda$
as $\lambda$ becomes $\frac{\lambda }{\mu }$
so fringe width is $\frac{\beta }{\mu }$
option $B$ is correct