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Wave dispersion

  1. Nov 28, 2009 #1
    Let us assume we possess a line radiator. It's extent is infinite and it radiates 360*.

    As far as I understand, an expanding spherical wave of order 0 is not dispersive. I assume an expanding cylindrical wave of order 0 would possess dispersion, however I am not certain.

    Could any members offer insight on this?

    Best Regards,
    Thadman:biggrin:
     
  2. jcsd
  3. Nov 28, 2009 #2
    i don't think any radiated wave can be dispersive in a vacuum, because all wavelengths travel at the same velocity. To be non-dispersive, there can not be any (wavelength dependent) attenuation either, because dispersion and attenuation are coupled through the dispersion relations. See
    http://en.wikipedia.org/wiki/Dispersion_relation
    Bob S
     
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