Question

Two sound waves having a phase difference of ${60}^o$, have a path difference of :

• A. $\frac{\lambda }{3}$
• B. $\frac{\lambda }{6}$
• C. $\frac{\lambda }{9}$
• D. $\lambda$

Answer 1

Answer: (B)

$\frac{\lambda }{6}$

Path difference $\Delta =\frac{\lambda }{2\pi }\times \Delta \varphi$

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