A source emits sound at a fixed constant frequency f.
-If the source moves,the wavelength of the sound in front of the direction of motion is ____________ the wavelength behind the direction of motion.
A)the same as
B)larger than
C)smaller than
D)unrelated to

Question

Quizplus · Accepted Answer

When the source moves, the wavelength in front of the direction of motion gets compressed, resulting in a shorter wavelength. This is known as the Doppler effect. Similarly, the wavelength behind the direction of motion gets stretched, resulting in a longer wavelength. Therefore, the wavelength in front of the direction of motion is smaller than the wavelength behind the direction of motion.

A Source Emits Sound at a Fixed Constant Frequency F