If the source is moving away from the observer, then the apparent frequency …………..

if the speed of a sound source is equal to the speed fo sound and the source is moving away from the observer, then the ratio of apparent frequency to the original frequency is

if the speed of a sound source is equal to the speed fo sound and the source is moving away from the observer, then the ratio of apparent frequency to the original frequency is

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

If a source of light is moving away from a stationary observer, then the frequency of light wave appears to change because of

If a source of light is moving away from a stationary observer, then the frequency of light wave appears to change because of

When a train approaches a stationary observer, the apparent frequency of the whistle is n' and when the same train recedes away from the observer, the apparent frequency is n'' . Then the apperent frquency n when the observer sitting in the train is :

When a train approaches a stationary observer, the apparent frequency of the whistle is n' and when the same train recedes away from the observer, the apparent frequency is n" . Then the apperent frquency n when the observer sitting in the train is :

A source emits a frequency of "290Hz" .An observer is moving away from the source with a velocity "20ms^(-1)" and the source is moving away from the observer with a velocity "10ms^(-1)" .The wind is blowing in a direction from the observer to the source with a velocity "5ms^(-1)" .The apparent frequency heard by the observer is (Velocity of sound in air "=343ms^(-1)" )