Question

State the conditions based on Doppler effect

Answer 1

1. When the source of sound is in motion and the observer is at rest then the Doppler Effect is observed.
2. When the observer is in motion and the source at rest then the Doppler Effect is observed.
3. When the source and the observer are moving with unequal velocities then the Doppler Effect is observed.
4. When the source and the observer and intervening medium are in motion then the Doppler Effect is observed.