A) \[n'=n\left( \frac{v+{{v}_{0}}}{v} \right)\]
B) \[n'=n\left( \frac{v-{{v}_{0}}}{v+{{v}_{s}}} \right)\]
C) \[n'=n\left( \frac{v+{{v}_{0}}}{v} \right)\]
D) None of these
Correct Answer: C
Solution :
The apparent frequency heared by traveller moving forwards stationary train \[n'=n\left( \frac{v+{{v}_{0}}}{v+{{v}_{s}}} \right)\,\,=\,\,n\left( \frac{v+{{v}_{0}}}{v} \right)\]where, \[\operatorname{v}= speed of sound\] \[{{\operatorname{v}}_{0}}= speed of traveller.\]
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