Find the difference is the apparent frequencies (i) When the source approaches a stationary observer (ii) When observer is approaching the stationary source. Take b as relative velocity in each case and `upsilon` as the velocity of the waves.

The apparent frequency is f_(1) when a souece of sound approches a stationary obsever with a speed u and f_(2) when the observe approaches the stationary source with same speed. If v is the velocity of sound, then

When an observer moves towards a stationary source, then the apparent pitch will

When a source of sound is in motion towards a stationary observer, the effect observed is

Does the Doppler effect increase the intensity of wave when its source approaches the observer?

The difference between the apparent frequency of a sound of soun as perceived by an observer during its approach and recession is 2% of the natural frequency of the source. If the velocity of sound in air is 300m//s , the velocity of the source is (It is given that velocity of source ltlt velocity of sound )

When the source is moving towards the stationary observer, the apparent frequency is given by