| Definition: | for a sinusoidal wave at a given point, velocity in the direction of propagation of the wavefront corresponding to a specified phase Note 1 to entry: The magnitude of the phase velocity is equal to the product of frequency and wavelength, and to the quotient of angular frequency by angular wavenumber. Note 2 to entry: If both phase velocities and other velocities are involved, then c should be used for the former and v (vee) for the latter.
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