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group velocity
noun
The propagation velocity of the envelope of a modulated travelling wave, which is considered as the propagation velocity of information or energy contained in it.
Exact(60)
(a)–(c) Group velocity vx; (d)–(f) group velocity vy; and (g)–(i) incident and reflection angles of an incident K valley electron at a given ky.
The group velocity is given as where ν = x, y denotes x- and y-directional group velocity respectively.
Progressive waves, group velocity and dispersion, energy density and transport.
For capillary waves the group velocity is one and one-half times the phase speed.
Page, J. H. et al. Group velocity in strongly scattering media.
Govyadinov, A. A. & Podolskiy, V. A. Gain-assisted slow to superluminal group velocity manipulation in nanowaveguides.
In the physical sense, group velocity is the velocity of propagation of wave energy.
Dolling, G. et al. Simultaneous negative phase and group velocity of light in a metamaterial.
For deepwater waves, the group velocity (V) is half the wave speed (C).
The electron group velocity is fully reversed upon reflection, causing electrons to be retro-reflected.
Meanwhile, the group velocity dispersion effect is relatively small.
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