英语词汇“group velocity”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

group velocity

noun Physics

The speed at which the energy of a wave travels.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.

单词	group velocity
释义	group velocity noun Physics The speed at which the energy of a wave travels.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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