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In the adjacent diagram, CP represents a...

In the adjacent diagram, CP represents a wavefront and AO & BP, the corresponding two rays. Find the condition on `theta` for constructive interference at P between the ray BP and reflected ray OP.

A

`costheta=(2lambda)/(2d)`

B

`costheta=(2lambda)/(4d)`

C

`sectheta-costheta=(lambda)/(d)`

D

`sectheta-costheta=(4lambda)/(d)`

Text Solution

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The correct Answer is:
A
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