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Wave Length

nttwo station...

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nttwo stationary sources each emit waves of wavelength x. an observer moves from one source to another with velocity u. then no of beats heard by them? n

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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. The observer is moving with velocity

^{'} v_{0}^{'}

towards the stationary source of sound and then after crossing moves away from the source with velocity

^{'} v_{0}^{'}

. Assume that the medium through which the sound waves travel is at rest. If

^{'} v^{'}

is the velocity of sound and

^{'} n^{'}

is thee frequency emitted by the source then the difference between apparent frequencies heard by the observer is

Q. A sound source producing waves of frequency

300 H z

1 m

. Observer is stationary, while source is going away with the velocity

30 m / s

, then apparent frequency heard by the observer is:

Q. S is a stationary source of sound emitting waves of frequency

440 Hz

. These waves are reflected by a stationary wall and heard by observer O moving away with

v = 10 m/s

. Find beat frequency (in Hz) heard by observer in the position shown (due to superposition between reflected and direct waves)

(V_{sound} = 330 m/s)

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