What will happen If a fast-moving car making a loud noise drives away from a person?

Question

Question 1 options:

A)

The pitch of the sound being heard by the person will appear to be lower than the pitch of the source.

B)

The pitch of the sound being heard by the person will appear to be higher than the pitch of the source.

C)

The pitch and frequency of the sound waves reaching the person's ear will remain unchanged.

D)

The frequency of the sound waves reaching the person's ear will be greater than the frequency of the waves leaving the car.

Answer 1

As the fast-moving car drives away from the person, the phenomenon that occurs is known as the Doppler effect. In this case, the sound waves emitted by the car are stretched as the car moves away, resulting in a lower frequency of the sound that reaches the observer.

Based on this understanding, the correct answer is:

A) The pitch of the sound being heard by the person will appear to be lower than the pitch of the source.