The Doppler effect states that the frequency of a sound emitted by a moving sound source is _____ in front of the sound source than behind it.
A) higher
B) lower
C) simpler
D) clearer

Question

Quizplus · Accepted Answer

The Doppler effect describes how the frequency of a sound wave increases for an observer in front of the moving source and decreases for an observer behind it. This is because the sound waves are compressed in front of the source and stretched behind it.

The Doppler Effect States That the Frequency of a Sound