Definition of group velocity in English:

group velocity

Line breaks: group vel|ocity

noun

Physics
  • The speed at which the energy of a wave travels.
    More example sentences
    • Essentially, the group velocity of the wave must fall to zero at that location, dropping in such a way that there is sufficient time for the damping to dissipate all of the wave's energy before it gets to that point.
    • Even when the phase velocity is faster than light, the group velocity should be slower.
    • He counters that when a beam passes between positive- and negative-index media the group velocity is negatively refracted.

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