A) \[v/2\]
B) \[v/\sqrt{2}\]
C) \[v/3\]
D) \[v/4\]
Correct Answer: C
Solution :
[c] Let f? be the frequency of sound heard by cliff \[\therefore \,f'=\frac{vf}{v-{{v}_{c}}}\] ....... (1) Now for the reflected wave cliff, acts as a source \[\therefore \,\,2f'=\frac{f'(v+{{v}_{c}})}{v}\] ...... (2) \[2f=\frac{(v+{{v}_{c}})f}{v-{{v}_{c}}}\Rightarrow 2v-2\,\,\,\,\,{{v}_{c}}=v+{{v}_{c}}\] or \[\frac{v}{3}={{v}_{c}}\]You need to login to perform this action.
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