what does +ve charge in conductor means, do they move...

Darwin123

I don't have a link. Worse, the forum search engine doesn't find it! The record of it seems to have been expunged from the forum.

I was told that my comment post would be expunged. However, why hide the thread just because I am an idiot ?-)

I thought Cragar asked a good question for someone very new to relativity.

I do have a copy of the infamous exchange. A moderator sent me a message with a copy of the whole sorry exchange. He simply accused me of misleading the public and warned me not to do it again.

I'll copy just part of the dialog, skipping both moderator comments.

Quote by cragar
"If I had 2 charged slabs that were moving together at relativistic speeds would both slabs
emit cherenkov radiation. In each of the rest frames of the slabs the other slab is approaching it at a speed that is faster than the group velocity of light in its material."
Quote by Darwin123
"According to special relativity, that is not true.
If in the center of mass frame each slab is moving at a speed, u, then the relative velocity as measured in the rest frame of either frame is w, where,
w=2u/[1+(u/c)^2]
One can show that if u<c, then w<c."