| 单词 | phase velocity |
| 释义 | > as lemmasphase velocity phase velocity n. 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; cf. group velocity n. at group n. Compounds 2. ΘΚΠ the world > matter > physics > mechanics > types of motion > [noun] > wave > shape, speed, period, length, etc. waveform1845 wavelength1850 wave-front1867 wave-shell1877 wave velocity1887 wave period1909 transient1910 phase velocity1927 incoherence1938 waveshape1940 1927 Proc. National Acad. Sci. U.S.A. 13 334 While the geometrical behavior is the same, the phase velocity of the wave is given by u. 1968 M. S. Livingston Particle Physics iii. 49 Consider a pulse of water waves originating from the point where a stone strikes the water, and focus on a particular wave crest... The velocity with which the general disturbance moves is the group velocity; the velocity of the wave crest relative to the water is the phase velocity. 2001 Analog Sept. 45/2 Conventional physics allows the phase velocity to exceed the speed of light, although the group velocity (the speed at which information is actually conveyed) must be less than c. < as lemmas |
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