Two sound sources are moving in opposite directions with velocities v1 and v2 (v1 andgt; v2). Bothe are moving away from a stationary observer. The frequency of both the sources is 900 Hz. What is the value of v1 andndash; v2 so that the beat frequency observed by the observer is 6 Hz ? Speed of sound v=300m/s.Given that v1 and v2andlt;andlt; v:a)1 m/sb)2 m/sc)3 m/sd)4 m/sCorrect answer is option 'B'. Can you explain this answer?

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Two sound sources are moving in opposite directions with velocities v1 and v2 (v1 > v2). Bothe are moving away from a stationary observer. The frequency of both the sources is 900 Hz. What is the value of v1 – v2 so that the beat frequency observed by the observer is 6 Hz ? Speed of sound v=300m/s.Given that v1 and v2<< v :

a)
1 m/s
b)
2 m/s
c)
3 m/s
d)
4 m/s

Correct answer is option 'B'. Can you explain this answer?

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