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The intensity ratio of two coherent sour...

The intensity ratio of two coherent sources of light is p. They are interfering in some region and produce interference patten. Then the fringe visibility is

A

`(1+P)/(2sqrtP)`

B

`(2sqrtP)/(1+P)`

C

`(P)/(1+P)`

D

`(2P)/(1+P)`

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The correct Answer is:
B
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