- #1

espen180

- 834

- 2

As far as I know, in order to dertermine the complete state of a photon, we need to know the values of two entities, which are the position and momentum 4-vectors [tex]x^{\mu}[/tex] and [tex]p^{\mu}[/tex]. These are related through the HUP:

[tex]\Delta x^{\mu}\Delta p^{\mu}\geq \frac{\hbar}{2}[/tex] (no summation)

Also, photons always follow geodesic curves in space-time.

However, despite the fact that no geodesics exit from beyond the event horizon of a black hole, charged black holes exert a Lorentz force on other charged bodies. It appears like photons, when mediating the Lorentz force, are exempt from the rules of GR. I see two possibilities:

1. I have misunderstood something fundamental about charged black holes.

2. I don't know enough particle physics to make intelligent guesses about mediator particles.

If anyone could explain the issue to me, I would appreciate it.