Dispersion Relation

  • Thread starter yellowgold
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  • #1
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What is the dispersion relation in photons? "(Frequency momentum or etc)
 

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  • #2
Meir Achuz
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A dispersion relation is the relation between the frequency omega and the wave number k.
 
  • #3
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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.
 
  • #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.
 
  • #5
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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.
Ah, yes, of course, but the OP asked about photons.
 
  • #6
malawi_glenn
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Ah, yes, of course, but the OP asked about photons.
haha yeah now I saw he did! ;-)
Though he asked what dispersion relation was "in general"
 
  • #7
Avodyne
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The dispersion relation for photons is
[tex]\omega=|\vec k|c.[/tex]
 
  • #8
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Thank you very much everybody. I understood it.
 

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