A Doppler effect occurs when a source of sound moves
A)toward you.
B)at right angles to you.
C)both
D)neither

Question

Quizplus · Accepted Answer

A Doppler effect occurs when a source of sound moves toward you. This is because the motion of the source changes the frequency of the sound waves that are reaching you, causing a noticeable change in pitch. If the source is moving away from you, the Doppler effect will also occur, but the pitch of the sound waves will be lower rather than higher. A Doppler effect does not occur when the source is moving at right angles to you, as the distance between you and the source is not changing in a way that would affect the frequency of the sound waves.

A Doppler Effect Occurs When a Source of Sound Moves