slow light group-velocity and superluminal light

Superluminal group velocity

average velocity， mean velocity

group velocity and phase velocity

ratio of pulp velocity and sire velocity

velocity derived from velocity spectrum

Faster-than-light(Superluminal)

Quantum superluminal communication

Subluminal and Superluminal Propagation

superluminal

Superluminal behavior

superluminal expansion

superluminal light

superluminal motion

superluminal propagation

superluminal(faster-than-light)

1-D velocity structure

1st order slip velocity boundary

2 D velocity field