Question

If YDSE is immersed in a liquid of refractive index ${}^{\prime }\mu {}^{\prime }$ then the fringe width ${}^{\prime }\beta {}^{\prime }$

• A. decreases by $\mu$
• B. increases by $\mu$
• C. remains unchanged
• D. none of these

Answer 1

The correct option is A decreases by $\mu$

the fringe width $\alpha$ $\lambda$
as $\lambda$ becomes $\frac{\lambda }{\mu }$
so fringe width is decrased by $\mu$
option $A$ is correct