A) \[\frac{\pi }{3}\]
B) \[\frac{2\pi }{3}\]
C) \[\pi \]
D) \[\frac{\pi }{6}\]
Correct Answer: B
Solution :
Path difference between two points \[\Delta x=15-10=5\,\text{m}\] Time period, \[T=0.5\,s\Rightarrow \] frequency \[v=\frac{1}{T}=\frac{1}{0.05}=20\,\,Hz\] Velocity, \[v=300\,\,\text{m}{{\text{s}}^{-1}}\] \[\therefore \] Wavelength, \[\lambda =\frac{v}{v}=\,\frac{300}{20}=15\,m\] Hence, phase difference \[\Delta \phi =\frac{2\pi }{\lambda }\times \Delta x=\frac{2\pi }{15}\times 5=\frac{2\pi }{3}\]You need to login to perform this action.
You will be redirected in
3 sec