A source emits sound at a fixed constant frequency f .
If the source moves away from you, the frequency you hear is lower than f .

Name: A source emits sound at a fixed constant frequency f . If the source moves away from you, the frequency you hear is lower than f .
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Question

A source emits sound at a fixed constant frequency f . 
If the source moves away from you, the frequency you hear is lower than f .

Quizplus · Accepted Answer

This phenomenon is known as the Doppler effect and it causes the frequency of sound waves to decrease when the source is moving away from the observer.

A Source Emits Sound at a Fixed Constant Frequency F