Waves Ques 13

13. Two sound waves having a phase difference of $60^{\circ}$ have path difference of

[1996]

(a) $2 \lambda$

(b) $\frac{\lambda}{2}$

(c) $\frac{\lambda}{3}$

(d) $\frac{\lambda}{6}$

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Answer:

Correct Answer: 13.(d)

Solution:

  1. (d) Phase difference $=60^{\circ}=\frac{\pi}{3}$

Path difference $=\frac{\lambda}{2 \pi}$ (phase diff.)

$=\frac{\lambda}{2 \pi} \times \frac{\pi}{3}=\frac{\lambda}{6}$



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