Question

Doppler effect would take place in case of

Answer 1

1. The change in frequency of a wave observed by an observer who is in motion relative to the wave source is termed Doppler effect.
2. Doppler effect would take place when there is relative motion between observer and wave source.
3. Some of the examples include the variation of the pitch of siren of an ambulance as it passes by, the detection of new planets with Doppler shift of light, etc.