First slide

Coherent sources and their importance in interference

Question

In Young's double slit experiment, a mica sheet of thickness t and refractive index $μ$ is introduced in the ray from the first source S₁. By how much distance the fringes pattern will be displaced

Moderate

A

$\frac{d}{D} (μ - 1) t$
B

$\frac{D}{d} (μ - 1) t$
C

$\frac{d}{(μ - 1) D}$
D

$\frac{D}{d} (μ - 1)$

Solution

Shift in fringe pattern $\frac{D}{d} (μ - 1) t$ .

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