Question

If you wanted the pitch of a horn to drop relative to an observer, which way would you move the horn, relative to where that observer is located?

A.Leave it in the same place and play the horn more softly


B.Away from the observer


C.Towards the observer

Answer 1

(B) Away from the observer. 
The closer- the higher
The farther- the lower

Answer 2

Answer: The correct option is B

Explanation:

In Doppler effect, there is an apparent change in the frequency when there is a relative motion between the source and the listener.

Pitch depends on the frequency.

When the source and the listener are moving away from each other then there is decrease in the frequency. In this case, the pitch will be lower.

In the given problem, to drop the pitch of the horn relative to an observer, you would move the horn away from the observer.

Therefore, the correct answer is "Away from the observer".