MathLiveGroup velocity
The group velocity is the rate of change of angular frequency with respect to angular wavenumber, giving the speed at which the envelope or energy of a wave packet travels. It is used for waves in dispersive media such as light in fibres, water waves, and quantum matter waves.
c_{\mathrm{g}} = \frac{\mathrm{d} \omega}{\mathrm{d} k}What the symbols mean
| group velocity (m/s) | |
| angular frequency (rad/s) | |
| angular wavenumber (rad/m) |
About this formula
- FieldPhysics
- TopicWaves
- LevelUniversity
- Also calledgroup speed, group velocity of a wave packet, wave packet speed, dispersion relation derivative, domega dk, group velocity formula
- SourceWikidata Q217361
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