| 11. | Does stopping the group velocity means that the individual light waves themselves were stopped?
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| 12. | What travels at the group velocity for a monochromatic wave?
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| 13. | The group velocity therefore depends upon the dispersion relation connecting ? and " k ".
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| 14. | Showing that the velocity of a localized particle in quantum mechanics is its group velocity.
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| 15. | The deep-water group velocity is half the phase velocity.
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| 16. | Modal dispersion during propagation in the waveguide then provides group velocity dispersion to the signal.
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| 17. | This shows a wave with the group velocity and phase velocity going in different directions.
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| 18. | In dispersive media the phase velocity is not necessarily the same as the group velocity.
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| 19. | For example, the group velocity may have any value from zero up to Swihart velocity.
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| 20. | By definition, the group velocity \ boldsymbol { v } _ g is given by:
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