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Dispersion Relation

  1. Oct 30, 2008 #1
    What is the dispersion relation in photons? "(Frequency momentum or etc)
     
  2. jcsd
  3. Oct 31, 2008 #2

    clem

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    A dispersion relation is the relation between the frequency omega and the wave number k.
     
  4. Oct 31, 2008 #3
    Or, said in another way, how the phase speed of light (and hence, the index of refraction) depends on the light's frequency in that specific material/medium.
     
  5. Oct 31, 2008 #4

    malawi_glenn

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    lightarrow, why restrict yourself to light? The dispersion relation are for waves, all waves, as far as I have understood it.
     
  6. Oct 31, 2008 #5
    Ah, yes, of course, but the OP asked about photons.
     
  7. Nov 1, 2008 #6

    malawi_glenn

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    haha yeah now I saw he did! ;-)
    Though he asked what dispersion relation was "in general"
     
  8. Nov 1, 2008 #7

    Avodyne

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    The dispersion relation for photons is
    [tex]\omega=|\vec k|c.[/tex]
     
  9. Nov 1, 2008 #8
    Thank you very much everybody. I understood it.
     
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