The Doppler effect occurs because of which of he following:
A. waves bonce back when they hit boundary between media.

B. Waves change direction when they travel through different media

C. waves seem to be changing frequency because the source of the wave is moving

D.waves vibrate within same frequency as an object and the object oscillates

Question

The Doppler effect occurs because of which of he following:
A. waves bonce back when they hit  boundary between media.

B. Waves change direction when they travel through different media

C. waves seem to be changing frequency because the source of the wave is moving

D.waves vibrate within same frequency as an object and the object oscillates

anonymous · Answer

Waves seem to be changing frequency because of relative motion, and one case of this is that the source is moving!