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Two coherent light waves each having int...

Two coherent light waves each having intensities `I_(0)` interfering at a point in space where resulting intensity observed is `I_(0)//2`, the phase difference between the two waves at the point of interference can be :

A

`pi//3`

B

`2pi//3`

C

`4pi//3`

D

`5pi//3`

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The correct Answer is:
A
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