1 Oscillations
A source of sound S emitting waves of frequency 100 Hz and an observer O 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 :- 1) 97 Hz 2) 100 Hz 3) 103 Hz 4) 106 Hz
Component of Vs along observer = Vscosθ =19.4 × cos60 =9.7 Using formula for source moving to wards observer at rest
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