Black holes actually do "leak" some energy due to quantum effects, but most of the energy we see from black holes doesn't actually come from *inside* the black hole, instead we're seeing blasts of radiation caused by the black hole but occurring outside it, made by a sort of "generator" effect as mass swirls into the black hole's gravitational field. This causes some high-energy beams to spray outward, most strongly as jets aligned along the north and south pole of the black hole.
"How can a black hole emit radiation?" I think they emit on the fringe only, sort of like a victim screaming out before being swallowed by a lion!
As far as radiation emission is concerned: the materials being drawn into the black hole swirl around it like water entering a drain. Thus the gases and dust concentrate and as they swirl faster friction heats them to high energy levels indeed. Some of the infalling matter can even be shot out in jets from the polar regions of the area surrounding the black hole as the matter backs up faster than it can fall in.
The very high energies in the form of x-rays and gamma rays are emitted from the swirling gases before they reach the "event horizon" (the point of no return). Some of the energies are emitted in the opposite direction of the event horizon and do "escape" the black hole's influence at lightspeed.
It does, but accelerating charges emit radiation.
Article excerpt:
The force of gravity is effectively zero when compared to the electric force. If you allow for the electrical structure of matter, the almost 2,000 fold difference in mass of the electron and proton will ensure that in a strong gravitational field charge separation will operate to prevent compression. Charge separation prevents the collapse of stars. Exotic theoretical objects like neutron stars and black holes are impossible.
Full Article:
It doesn't. This is newspaper sloppiness. It's stuff falling in that emits radiation.