Question

The engine of a train sounds a whistle at frequency $\nu$. The frequency heard by a passenger is (If wind is blowing from passenger side to Train side)

• A. $\nu$
• B. $<\nu$
• C. $>\nu$
• D. $\approx \frac{1}{\nu }$

Answer 1

The correct option is A $\nu$

As there is no relative motion between the train and the passenger. Only the air is blowing.
So, there is no phenomena of the doppler.
Therefore same frequency will be heard by the passenger.

Hence, option $\left(D\right)$ is correct.