Phase, Group, and Signal Velocity
Abstract
Phase, group, and signal velocity are defined. Simple examples are given in which the phase and group velocities exceed the velocity of light, in which the phase velocity is a function of distance, and in which the group velocity is equal to the signal velocity.
- Publication:
-
American Journal of Physics
- Pub Date:
- December 1954
- DOI:
- 10.1119/1.1933858
- Bibcode:
- 1954AmJPh..22..618W