Two sound waves having a phase difference of 60º have path

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Two sound waves having a phase difference of 60º have path difference of

1. 2λ
2. λ/2
3. λ/3
4. λ/6

Correct Option: D

Phase difference = 60° = π/3

Path difference =	λ	(phase diff.)
	2π

=	λ	×	π	-	λ	×
	2π		3		6