A listener moving with constant velocity passes a statlonary source. Draw a graph to show the change of apparent frequency of the source to the listener with time . Actual frequency of source is n.

A listener moving with constant velocity passes a statlonary source. D

1.	A listener moving with constant velocity passes a statlonary source. Draw a graph to show the change of apparent frequency of the source to the listener with time . Actual frequency of source is n.
Answer» Solution :While approaching the stationary source apparent frequency will be ` n. = (V + u_(o))/(V) = n` …(1) [velocity of sound in air = V , velocity of listener = ` u_(o)` ] Whlle receding the stationary source apparent frequency will be ` n.. = (V - u_(0))/(V) n` ...(2) from equation (1) and (2) it is clear that n. and n.. remain constant with time also ` n. gt n gt n..` . The change of apparent frequency with time is SHOWN below . Here OS denoes the time taken by the listener to pass by the source . After then the listener continually moves away from the source .