4 ms·
IANAP(hysicist), but afaik it's due to pair production of photons at the boundary of the black hole. One photon falls into the black hole, the other escapes in
by qrendel 11y ago
IANAP(hysicist), but afaik it's due to pair production of photons at the boundary of the black hole. One photon falls into the black hole, the other escapes in the opposite direction, conserving momentum. The pair production of photons is stimulated by the black hole itself through <some complicated interaction>, thereby causing the black hole to lose energy over time as the escaping photons are lost, which are called Hawking radiation. The many frequencies occur because the pair production produces pairs of photons at different energies/frequencies.
- MichaelApproved 11y agoNo, we can't detect Hawking radiation, yet. It's too faint. http://physics.stackexchange.com/questions/48032/how-would-you-detect-hawking-radiation http://physics.stackexchange.com/questions/48032/how-would-y... > Emitted Radiation When material falls into a black hole from a companion star, it gets heated to millions of degrees Kelvin and accelerated. The superheated materials emit X-rays, which can be detected by X-ray telescopes such as the orbiting Chandra X-ray Observatory. > In addition to X-rays, black holes can also eject materials at high speeds to form jets. Many galaxies have been observed with such jets. Currently, it is thought that these galaxies have supermassive black holes (billions of solar masses) at their centers that produce the jets as well as strong radio emissions. http://science.howstuffworks.com/dictionary/astronomy-terms/black-hole3.htm http://science.howstuffworks.com/dictionary/astronomy-terms/...
- qrendel 11y agoI thought the question was about radiation emitted by the black hole itself, i.e. Hawking radiation, not radiation emitted by matter outside but near the black hole, i.e. accretion disk radiation. It's not really contradictory that stuff outside the event horizon can still escape.
- MichaelApproved 11y agoYou are correct, I was mistaken.