Explain what is Doppler effect in sound
The apparent change in the frequency of sound emitted by a source as heard by the observer when there is a relative motion between the source of the sound and an observer is called Doppler Effect.
The working of RADAR is based on ...............
b) speed of a star
c) Doppler effect
d) speed of rotation of sun
Wavelengths of two notes in the air are`[70/153]^m` and `[70/157]^m`. Each of these notes produces 8 beats per second with a tuning fork of fixed frequency. Find the velocity of sound in the air and frequency of the tuning fork.
Doppler effect is not applicable when _______.
(A) source and observer are at rest.
(B) there is a relative motion between source and observer.
(C) both are moving in opposite directions.
(D) both are moving in same direction with different velocities
- Doppler effect in light
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