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Three waves of same intensity (I0) havin...

Three waves of same intensity `(I_0)` having initial phases ` 0, pi/4 , - pi/4 ` rad respectively interfere at a point. Find the resultant Intensity

A

`I_0`

B

0

C

`5.8 I_0`

D

`0.2 I_0`

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The correct Answer is:
C
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