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(B) The phase difference $\Delta \phi$ between the vibrations of two particles of a medium separated by a distance $\Delta x$ is given by the formula:

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Varies with distance separating them

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(B) The phase difference $\Delta \phi$ between the vibrations of two particles of a medium separated by a distance $\Delta x$ is given by the formula:$\Delta \phi = \frac{2 \pi}{\lambda} \Delta x$where $\lambda$ is the wavelength of the wave.From this expression,it is clear that the phase difference depends directly on the path difference $\Delta x$,which is the distance separating the two particles. Therefore,the phase difference varies with the distance separating them.

The particles of a medium vibrate about their mean positions whenever a wave travels through that medium. The phase difference between the vibrations of two such particles

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