奇葩剧汉英词典

group velocity

G 开头单词

柯林斯词典

    group speed (also group velocity)

  • 1. N the speed at which energy is propagated in a wave. This is the quantity determined when one measures the distance which the radiation travels in a given time. In a medium in which the speed increases with wavelength the group speed is less than the phase speed, and vice versa 群速[physics]

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