| 31. | When the dispersion is anomalous, however, group velocity is no longer an indicator of signal velocity.
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| 32. | Wave packets have group velocity and phase velocity.
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| 33. | :The dot itself moves faster than C, as a result of the group velocity of the photons.
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| 34. | The result of group velocity dispersion, whether negative or positive, is ultimately temporal spreading of the pulse.
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| 35. | The red dot moves with the phase velocity, and the green dots propagate with the group velocity.
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| 36. | The angular intervals for the DSW phase and group velocities ( ??ph and ??gr ) are different.
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| 37. | When reading about the group velocity, I always find the discussion framed in terms of wave packets.
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| 38. | In deep water the groups travel at a group velocity which is half of the phase speed.
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| 39. | The group velocity is defined as:
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| 40. | Usually, such reports deal with a phase velocity or group velocity faster than the vacuum velocity of light.
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