A plane harmonic wave with frequency co propagates at a velocity v in a direction forming angles a, , with the x, y, z axes Find the phase difference between the oscillations at the points of medium with coordinates x1, Y1, z1 and x2, y2, z2

Question: A plane harmonic wave with frequency co propagates at a velocity v in a direction forming angles a, , with the x, y, z axes.

A plane harmonic wave with frequency co propagates at a velocity v in a direction forming angles a, β, γ with the x, y, z axes. Find the phase difference between the oscillations at the points of medium with coordinates x1, Y1, z1 and x2, y2, z2.

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