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A progressive wave of frequency 550 Hz i...

A progressive wave of frequency 550 Hz is travelling with a velocity of 360 ms How far apart are the two points `60^@` out of phase ?

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We know that for a wave `v=f lamda` So `lamda = (v)/(f)=(360)/(500)=0.72m`
Phase difference `Deltaphi=60^(@)=(pi//180)xx60=(pi//3)` rad, so path difference `Delta x=(lamda)/(2pi)(Deltaphi)=(0.72)/(2pi)xx(pi)/(3)=0.12 m`.
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ALLEN-WAVES AND OSCILLATIONS-Part-1(Exercise-05)[B]
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