A source of sound S emitting waves of frequency 100 Hz and an observer 0 are located at some distance from each other. The source is moving with a speed of 19.4 ms^(-1) at an angle of 60^(@)with the source observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air 330 ms^(-1)) is ......

A source of sound S emitting waves of frequency 100 Hz and an observer

1.	A source of sound S emitting waves of frequency 100 Hz and an observer 0 are located at some distance from each other. The source is moving with a speed of 19.4 ms^(-1) at an angle of 60^(@)with the source observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air 330 ms^(-1)) is ......
Answer» 97 HZ 100 Hz 103 Hz 106 Hz Solution : We have, `(f _(L))/( v + v _()) = (f _(S))/( v + v _(S))` `THEREFORE (f _(L))/( 330 + 0) = (100)/( 330 -9.7)` `therefore f _(L) = 330 XX (100)/(320.3) = 103.03 Hz`