A) 2
B) 4
C) 6
D) 8
Correct Answer: B
Solution :
Idea This question is based on the concept of constructive and destructive interference of waves and its relation with path difference. At point P and Q path difference is equal to zero. So, point P and Q are parts y constructive interference, Now in points R and S path difference is equal to 1.5\[\lambda \], according to question path difference of 1.5\[\lambda \]also correspond, to point of constructive difference.You need to login to perform this action.
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