Linked from

The 20 pages that link to Group velocity, each with the reason it gives.

• SpeedRelated: It can differ from phase velocity, distinguishing the motion of a wave pattern from its envelope.

• Dispersion relationRelated: Its value follows from the slope of frequency against wave number.

• DispersionRelated: Its frequency dependence determines how quickly a pulse envelope travels through a dispersive medium.

• Effective massRelated: In a band, the slope of energy with momentum sets carrier group velocity.

• Matter waveRelated: For a free particle, the matter-wave packet's group velocity corresponds to particle velocity.

• Coherence lengthRelated: It converts coherence time into propagation distance for a wave packet.

• WaveguideRelated: A guide's dispersion makes energy travel at a frequency-dependent speed.

• Photon momentumRelated: In dispersive media, momentum cannot generally be inferred by substituting group speed for vacuum light speed.

• Free particleRelated: For a nonrelativistic free particle, a wave packet's group velocity matches its momentum divided by mass.

• Wave packetRelated: It often describes the packet’s motion when its envelope remains identifiable.