What is Doppler effect? Derive the formula for the change in apparent frequency (i)Both source and listener move towards and away from each other. (ii) Both source and listaner move one behind the other source follows the listener and listener follows the source. (iii) Source at rest, listener moves towards and away from the source. (iv) Listener at rest, source moves towards and away from the listener.

What is Doppler effect? Derive the formula for the change in apparent

1.	What is Doppler effect? Derive the formula for the change in apparent frequency (i)Both source and listener move towards and away from each other. (ii) Both source and listaner move one behind the other source follows the listener and listener follows the source. (iii) Source at rest, listener moves towards and away from the source. (iv) Listener at rest, source moves towards and away from the listener.
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