A Doppler effect occurs when a source of sound moves
A)toward you.
B)at right angles to you.
C)both of these
D)none of these

Question

Quizplus · Accepted Answer

The Doppler effect is the change in frequency or pitch of a sound wave caused by the relative motion between the source of the sound and the observer. When the source of the sound moves towards the observer, the sound waves get compressed, leading to a higher frequency or pitch. When the source of the sound moves away from the observer, the sound waves get stretched, leading to a lower frequency or pitch. Therefore, a Doppler effect occurs when a source of sound moves towards the observer (option A).

A Doppler Effect Occurs When a Source of Sound Moves