Optics Question 160

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

Options:

A) λ2(nl)

B) λ(n+l)

C) λ2(n+l)

D) λ(nl)

Show Answer

Answer:

Correct Answer: B

Solution:

For maxima 2πn=2πλ(XO)2πl

or 2πλ(XO)=2π(n+l) or (XO)=λ(n+l)



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