in a stretched string the speed of wave is 20m/s ` frequency 50hz . the find the phase difference in vibration of two point at string situate 10cm

Answers (1)
S safeer

The wavelength 

\lambda=\frac{v}{\nu}=\frac{20}{50}=0.4=40cm

and 

\Delta \phi=\frac{2\pi}{\lambda}\times\Delta x=\frac{2\pi}{40}\times10=\frac{\pi}{2}

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