waves

Question: At a moment in a progressive wave, the phase of a particle executing S.H.M. is $\frac{\pi }{3}$. Then the phase of the particle 15 cm ahead and at the time $\frac{T}{2}$ will be, if the wavelength is 60 cm



1) $\frac{\pi }{2}$
2) $\frac{2\pi }{3}$
3) Zero
4) $\frac{5\pi }{6}$
Solution: Explanation: No Explanation
Progressive Waves

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