Question

Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by `2 pid` radian. If there is a maximum in direction D, the distance XO using n as an integer is given by

A. `lambda/2(n-l)`
B. `lambda(n+l)`
C. `lambda/2(n+l)`
D. `lambda(n-l)`

Answer 1

Correct Answer - B
`phi=(2pi)/lambda Deltax-2pil`
`2pin=(2pi)/lambda(OX)-2pil`
`OX=lambda(n+l)`