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Two waves of same frequency but of ampli...

Two waves of same frequency but of amplitude a and 2a respectively superimpose over each other. The intensity at a point where the phase difference is `(3pi)/(2)`, will be proportional to :

A

`9a^(2)`

B

`3a^(2)`

C

`a^(2)`

D

`5a^(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
`Iprop A^(2)`
`I=I_(1)+I_(2)+2sqrt(I_(1)+I_(2))cos phi`
`I=5 a^(2)`
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Knowledge Check

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