Phase Velocity

The velocity with which planes of equal phase, crests or troughs, progress through the medium.

where

v_p = phase velocity [ms^-1]

ω = angular frequency [rads^-1]

k = wavenumber [m^-1]

f = frequency [Hz]

λ = wavelength [m]

In both dispersive and non-dispersive media the wave velocity for sinusoidal waves of a particular frequency is termed the phase velocity.

See also: Group Delay, Group Velocity, Wave Equation.