Question

What is doppler's effect?

Answer 1

the phenomenon of apparent change in the frequency of sound heard due to relative motion between source and observer is called as Doppler effect.

Answer 2

According to Doppler's effect , whenever there is a relative motion between a source of sound and listener, the apparent frequency of soumd heared by the listener is different from the actual frequency of sound emitted by the source .
☆----------------------☆---------------------------☆