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Talk:Group velocity

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This is an old revision of this page, as edited by 208.230.167.50 (talk) at 14:48, 24 May 2005. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

The group velocity of a wave is the velocity with which the overall shape of the wave's amplitude (known as the envelope of the wave) propagates through space.

I have NO idea what this means! "overall shape of ...amplitude" ? I thought amplitude was a number (scalar). Even if its a vector, tensor or other function, the claim (implicit) that it has a "shape" which propagates is unhelpful gobble-de-gook.

What about talking about wave composition? or "repeating units" (as in poly-"mers")

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