Group Velocity

A group may be made up of a number of different frequencies, wavelengths and velocities that are superposed. Such a group would disperse with time if the wave velocity of each component is different.
where
vg = group velocity [ms-1]
vp = phase velocity [ms-1]
ω = angular frequency [rads-1]
k = wavenumber [m-1]
λ = wavelength [m]

See also: Group Index, Phase Velocity, Wave Equation.

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Subjects: Classical Mechanics