First slide

Coherent sources

Question

in the given arrangement S₁and S₂ are coherent sources [Fig.(1)]. the point P is a point of

Moderate

A

bright fringe
B

dark fringe
C

either dark or bright
D

none of these

Solution

The path difference at P is
$S_{1} P - S_{2} P = 2 λ (even multiple of λ) Hence P is a point of bright fringe$

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