Two sound sources each emitting waves of wavelength lymbda are fixed a given distance apart and an observer moves from one source to another with velocity u. Then number of beats heard by him per second is

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Two sound sources fixed at a given distance apart are emitting sound each of wavelength λ. A Listener moves with a velocity v₀ along the line joining the two sources , the number of beats heard by him per second is

Q. Two stationary sources each emit waves of wavelength

λ

. An observer moves from one source to another with velocity

u

. Then, the number of beats per second heard by the observer is:

[Assume, medium is stationary ; the source and the observer are collinear]

Q. Two stationary sources each emit wave of Wavelength

λ

. An observer moves from one source to another with velocity u. Then the number of beats to another with velocity u. Then number of beats

Q. A sound source emits frequency of

180 Hz

when moving towards a rigid wall with speed

5 m/s

and an observer is moving away from wall with speed

5 m/s .

Both source and observer moves on a straight line which is perpendicular to the wall. The number of beats per second heard by the observer will be

[speed of sound = 355 m/s]

Q. If a source emitting waves of frequency

f

moves towards an observer with a velocity

\frac{v}{4}

and the observer moves away from the source with a velocity

v / 6

, the apparent frequency as heard by the observer will be (

v =

velocity of sound)

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