| 21. | This tensor expresses the change in group velocity due to a change in crystal momentum.
|
| 22. | Consequently, for that wave situation, the group velocity is
|
| 23. | The phase velocity drops smoothly while the group velocity drops somewhat precipitously towards a minimum.
|
| 24. | The time-varying amplitude does not propagate at the phase velocity but rather at the group velocity.
|
| 25. | In general, shorter waves have an eastward group velocity and long waves a westward group velocity.
|
| 26. | The energy transport velocity is the group velocity.
|
| 27. | In general, shorter waves have an eastward group velocity and long waves a westward group velocity.
|
| 28. | However the physically more important group velocity interval is substantially larger ( proportional to ? ).
|
| 29. | The group velocity is sort of the " average " speed of the whole little pulse.
|
| 30. | There are two velocities that are associated with waves, the phase velocity and the group velocity.
|
