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Understanding the dispersion of waves
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[QUOTE="sophiecentaur, post: 6207146, member: 199289"] If you take a (temporal) trace of that wave at some point, it will have a certain shape. Move along the path a bit and the (temporal) shape will not change if the two waves have the same speed (c). When c varies, the shape of the wave will change and that's dispersion. I think the devil is in the detail of what must be happening to the [I]relative[/I] phases of the two waves as they progress in a non-dispersive medium ( the k's and the ω's). That's a sort of reality check with the evidence that pulse shapes don't change with distance without a dispersive medium. [/QUOTE]
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Understanding the dispersion of waves
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