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Spectral Content

  1. Oct 21, 2008 #1
    Hello Guys,

    Can any body tell me what is "The spectral content of a plane wave train"?
  2. jcsd
  3. Oct 22, 2008 #2


    Staff: Mentor

    It could be anything, its unspecified. A plane wave describes a wave that propagates in one direction and is infinite in the other two. Such a wave could contain any frequencies.
  4. Oct 22, 2008 #3

    Andy Resnick

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    It could mean a couple of things.

    First, the reference could be to the temporal frequency content- if the wave is polychromatic or monochromatic. Any wave train that has a finite temporal duration will have a temporal frequency spread

    Or, it could refer to spatial frequency spread- any wave train of finite spatial extent will have a spread in spatial frequencies.
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