A sound source of frequency 500 Hz and an observer are moving along their line of motions with speeds 10 m/s and 20 m/s respectively. The frequency of the sound as heard by the observer at the moment as shown in the figure is nearly equal to (speed of sound in air is 340 m/s):
Text Solution
Verified by ExpertsThe correct answer is:
B
Along the joining line, components of velocities are towards each other. Hence effect of motions of both is to increase apparent frequency. Thus apparent frequency is
f = 500 
= 530 Hz
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