Q68 / 90 · JEE Main 2013 (07 Apr) · Physics

Two coherent point sources $S_{1}$ and $S_{2}$ are separated by a small distance $d$ as shown in the figure. The fringes obtained on the screen will be

A
semi-circles
Correct answer
B
concentric circles
C
points
D
straight lines

Solution

Path difference on circles around

P

is same. So, The fringes obtained on the screen in the given condition will be concentric circles.

Hence, the correct answer is option: 'B'.

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