A) 10 cm
B) 15 cm
C) 20 cm
D) 50 cm
Correct Answer: B
Solution :
Velocity of wave v)= 360 m/s Frequency, \[n=600\text{ }Hz\] Phase difference, \[\phi =60{}^\circ \] If the minimum distance between two points is\[\Delta x\]then \[\Delta x=\frac{\lambda }{2\pi }\times \Delta \phi \] Or \[\Delta x=\frac{V}{2\pi n}\times \Delta \phi \] Or \[\Delta x=\frac{360}{2\pi \times 600}\times 60\] \[\Delta x=\frac{360}{2\pi \times 600}\times \frac{\pi }{3}\] \[\Delta x=\frac{1}{10}m\] \[\Delta x=10\,m\]
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