Q. In the Young’s double slit experiment, a mica slip of thickness $t$ and refractive index $\mu$ is introduced in the ray from first source$S_{1}$. By how much distance fringes pattern will be displaced.
A) $\frac{d}{D}(\mu - 1)t$
B) $\frac{D}{d}(\mu - 1)t$
C) $\frac{d}{(\mu - 1)D}$
D) $\frac{D}{d}(\mu - 1)$
Explanation
(b) For a path difference $(\mu - 1)t$, the shift is
$x = (\mu - 1)t\frac{D}{d}\ $
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.