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The path difference between the two wave...

The path difference between the two waves
`y_(1)=a_(1) sin(omega t-(2pi x)/(lambda)) and y(2)=a_(2) cos(omega t-(2pi x)/(lambda)+phi)` is

A

`(lambda)/(2pi) phi`

B

`(lambda)/(2pi) (phi + (pi)/(2))`

C

`(2 pi)/(lambda) (phi - (pi)/(2))`

D

`(2 pi)/(lambda) phi`

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