| 41. | Consequence of that is ideal phase and group velocity matching for the two waves propagating along the crystal.
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| 42. | Usually the shorter Rossby waves have an eastward group velocity and the longer ones have a westward group velocity.
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| 43. | A common misconception occurs between phase velocity and group velocity ( analogous to centres of mass and gravity ).
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| 44. | Usually the shorter Rossby waves have an eastward group velocity and the longer ones have a westward group velocity.
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| 45. | The waves propagate on the ocean surface, and the wave energy is also transported horizontally with the group velocity.
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| 46. | The group velocity can also exceed c and is not the speed at which information is communicated in general.
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| 47. | The generated electromagnetic wave power has its group velocity directed oppositely to the direction of motion of the electrons.
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| 48. | The first superprism also modified group velocity rather than phase velocity in order to achieve the " superprism phenomena ".
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| 49. | The effect arises because wave parameters such as group velocity or vertical wavenumber depend on mean flow direction and strength.
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| 50. | Such a material allows an electromagnetic wave to convey energy ( have a group velocity ) against its phase velocity.
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