A train is approaching towards a stationary person with a velocity v . The train emits a light signal. The signal will reach the stationary person with a velocity

When a source moves away from stationary observer with velocity v then apparent change in frequency is Deltan_(1) . When an observer approaches the stationary source with same velocity v then change in frequency is Deltan_(2) then

A plane mirror and a person are moving towards each other with same velocity v. Then the velocity of the image is

An observer is approaching a stationary source with a velocity 1/4 th of the velocity of sound. Then the ratio of the apparent frequency to actual frequency of source is

An observer approaches towards a stationary source of sound at constant velocity and recedes away at the same speed. The graph of wavelength observed with time is:

An observer approaches towards a stationary source of sound at constant velocity and recedes away at the same speed. The graph of wavelength observed with time is:

An object producing a pitch of 600 Hz approaches a stationary person in a straight line with a velocity of 200m/s Veocity of sound is 300 m/s The person will note a change in frequency ,as the object flies past him, equal to