- group velocity
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the propagation velocity of the envelope of a modulated travelling wave, which is considered as the propagation velocity of information or energy contained in it.
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group velocity
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Group velocity — [ Frequency dispersion in bichromatic groups of gravity waves on the surface of deep water. The red dot moves with the phase velocity, and the green dots propagate with the group velocity. In this deep water case, the phase velocity is twice the… … Wikipedia
group velocity — Physics. the velocity of finite numbers of waves undergoing simple harmonic motion, equal to the phase velocity when it does not vary with the wavelengths of the waves. The group velocity of the set of waves produced in water when a stone is… … Universalium
group velocity — grupinis greitis statusas T sritis Standartizacija ir metrologija apibrėžtis Apibrėžtį žr. priede. priedas( ai) Grafinis formatas atitikmenys: angl. envelope velocity; group velocity vok. Gruppengeschwindigkeit, f rus. групповая скорость, f pranc … Penkiakalbis aiškinamasis metrologijos terminų žodynas
group velocity — grupinis greitis statusas T sritis fizika atitikmenys: angl. envelope velocity; group velocity vok. Gruppengeschwindigkeit, f rus. групповая скорость, f pranc. vitesse de groupe, f … Fizikos terminų žodynas
group velocity — /grup vəˈlɒsəti/ (say groohp vuh losuhtee) noun (in waves whose phase velocity varies with wavelength) a non sinusoidal disturbance which will travel at a velocity different from the phase velocity …
group velocity — noun : the velocity with which some definite peculiarity of a composite wave train (as an interference maximum) advances through a medium compare phase velocity … Useful english dictionary
group velocity — noun Physics the speed at which the energy of a wave travels … English new terms dictionary
Group delay and phase delay — Group delay is a measure of the time delay of the amplitude envelopes of the various sinusoidal components of a signal through a device under test, and is a function of frequency for each component. Phase delay is a similar measure of the time… … Wikipedia
group — n. & v. n. 1 a number of persons or things located close together, or considered or classed together. 2 (attrib.) concerning or done by a group (a group photograph; group sex). 3 a number of people working together or sharing beliefs, e.g. part… … Useful english dictionary
Velocity-addition formula — In physics, a velocity addition formula is an equation that relates the velocities of moving objects in different reference frames. Contents 1 Galilean addition of velocities 2 Special theory of relativity 3 Derivation … Wikipedia
