| 释义 |
Definition of phase velocity in English: phase velocitynoun Physics The speed of propagation of a sine wave or a sinusoidal component of a complex wave, equal to the product of its wavelength and frequency. Example sentencesExamples - The speed of each frequency component is called phase velocity, while the packet's speed is called group velocity.
- Perhaps the reported observation, if confirmed, may reveal a hitherto unknown property of light: the apparently excessive speed might be something like phase velocity.
- For example, the phase velocity of a wave packet is a pseudo process but the group velocity is a causal process; yet both licence reliable predictions.
- Notice the light wave is still only propagating at c, the phase velocity of the wave, however, may travel less, or even greater than at the speed of light.
- Even when the phase velocity is faster than light, the group velocity should be slower.
|