Question

question 34
how does the doppler effect manifest in sound waves?
sound waves become invisible.
sound waves change pitch as the source moves.
sound waves stop moving.
sound waves change color.

Explanation:

The Doppler effect for sound waves is the change in pitch (frequency) perceived by an observer when the source of the sound or the observer is in motion. When the source moves towards the observer, the frequency increases (higher - pitched sound), and when it moves away, the frequency decreases (lower - pitched sound). Sound waves are not visible in the normal sense and don't have color, and they don't stop moving due to the Doppler effect.

Answer:

Sound waves change pitch as the source moves.