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In the set up shown in figure, the two s...

In the set up shown in figure, the two slits `S_1` and `S_2` are not equidistant from the slit S. The central fringe at O is then

A

Always bright

B

Always dark

C

Either dark or bright depending on the position of S

D

Neither dark nor bright.

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The correct Answer is:
C
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