Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by `2pi//radian`. If there is a maximum in direction D the distance XO using n as an integer is given by A. (a) `lambda/2(n-l)`B. (b) `lambda(n+1)`C. (c) `lambda/2(n+1)`D. (d) `lambda(n-1)`

Two point sources X and Y emit waves of same frequency and speed but Y

1.	Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by `2pi//radian`. If there is a maximum in direction D the distance XO using n as an integer is given by A. (a) `lambda/2(n-l)`B. (b) `lambda(n+1)`C. (c) `lambda/2(n+1)`D. (d) `lambda(n-1)`
Answer» Correct Answer - B For maxima `2pin=(2pi)/(lambda)(XO)-2pil` or `(2pi)/(lambda)(XO)=2pi(n+l)` or `(XO)=lambda(n+l)`

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Two point sources X and Y emit waves of same frequency and speed but Y lags in phase behind X by `2pi//radian`. If there is a maximum in direction D the distance XO using n as an integer is given by A. (a) `lambda/2(n-l)`B. (b) `lambda(n+1)`C. (c) `lambda/2(n+1)`D. (d) `lambda(n-1)`

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