Question

If you are moving toward the source of a sound wave and then pass the source and continue moving away, the _____ will change.A.volume of the soundB.pitch of the soundC.energy of the waveD.amplitude of the wave

Answer 1

To find:

What will change when the observer moves relative to the source?

Explanation:

The change in the frequency of a wave emitted by a source is called the doppler effect.

The Doppler effect can be described as the difference between the frequency emitted by a source and the frequency observed by an observer who is in a relative motion with the source.

Final answer:

Thus, as you move past the source, the pitch (frequency) of the sound will change.

Therefore the correct answer is option B.