Linked from

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

• Refractive indexCompared with: It can differ from phase velocity, so it yields a different index-like measure.

• Speed of lightCompared with: In dispersive media it can differ from both phase speed and information speed.

• Standing waveCompared with: A standing pattern has no traveling envelope carrying it along.

• Phase velocityCompared with: It describes packet motion, which can differ from the motion of constant phase.

• Phase (waves)Compared with: It tracks the envelope, unlike phase velocity, which tracks constant phase.

• Sound speedCompared with: It can differ from phase velocity when sound is dispersive.

• WavefrontCompared with: It can differ from phase propagation, which wavefronts track.

• Seismic velocityCompared with: It can differ from phase velocity in dispersive seismic waves.

• Wave vectorCompared with: It describes packet motion; the wave vector describes spatial phase variation.

• Scharnhorst effectCompared with: A change in phase velocity does not by itself show that information travels faster.