Moving charge in gravitational field.

Sagar_C

An accelerated charge particle radiates. So, in the light of principle of equivalence, does a charge particle also radiate when it is in a gravitational field? Sorry if the question doesn't make any sense.

Muphrid

I would say no, because "acceleration" really means "proper acceleration". A box with a rocket on the bottom is the same as a box on the Earth because they both exhibit non-zero proper acceleration. If the box and the person inside are both being acted on by a graviational field and in free-fall, you can't tell that you're accelerating.

If the particle is following a geodesic, I don't believe it will radiate.

jfy4

we've had some good long threads about this, search the archive here at PF to read through them.

Sagar_C

I thought so but somehow couldn't find. :(...Would you have some time to lead to those?

Edited to add: I found one: http://www.physicsforums.com/showthread.php?t=65767 . Any other would be appreciated.

tom.stoer

here's another one: http://www.physicsforums.com/showthread.php?t=576478