A) 165 Hz
B) 150 Hz
C) 660 Hz
D) 330 Hz
Correct Answer: C
Solution :
\[\operatorname{Phase} difference = \frac{2\pi }{\lambda } \times path difference\] \[\Rightarrow \,\,\,\,1.6\,\,\pi \,\,=\,\,\frac{2\pi }{\lambda }\times 40 \,\Rightarrow \,\, \lambda =50\,\,cm\,\,=\,\,0.5\,\,m\,\] \[\Rightarrow \,\,\,\,u=n\lambda \,\,\,\,\,\,\Rightarrow \,\,\,\,\,300=0.5\times n\,\,\] \[\Rightarrow \,\,\,n=660\text{ }Hz\]You need to login to perform this action.
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