Fundamental question

  • #1

Main Question or Discussion Point

Why must the 4-momentum for photons [tex] p^\mu =(\frac{h\nu}{c},\frac{h\nu}{c} \textbf{e}) [/tex] transform as a 4-vector in Special Relativity?
 

Answers and Replies

  • #2
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I don't understand the question. The four-momentum transforms as a four-vector for all particles, not just photons.
 
  • #3
CompuChip
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And if you apply an arbitrary Lorentz transformation, you can easily check that it does.
You can even derive it (Let [itex]p^\mu = (p^0, \vec{p})[/itex], apply a Lorentz transformation and you will see what p0 should be).
 

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