Amateur Astronomy
Can Black Holes Evaporate?
Astrophysical black holes are objects so large, that have a gravity so high, that their escape velocity (about seven miles per second on Earth) exceeds the ultimate cosmic speed limit – the speed of light (186,000 miles per second). Because he can not travel faster than the speed of light, nothing (hardware and / or energy) once in a black hole never to leave – or if the logic seems to go tighter.
However, this is all according to classical physics. A physicist named Jacob Bekenstein came with the idea of ??applying quantum physics to the object (as suggested by his mentor John Wheeler – who coined the term “Black Hole”), and once that is done, well, here, these things suggest the entropy, and therefore the temperature and must therefore issue and because he can throw the goods. His ideas were pondered several times and finally agreed to expand and by astrophysicist / cosmologist Stephen Hawking famous. This thing that the black hole can spit now run under the name of Hawking radiation, or give credit where credit is due to the Bekenstein-Hawking radiation technique. However, it is usually just called Hawking radiation so I’ll stick with this convention.
Of course, if the black hole has a temperature, then they should follow the same laws as other objects with the thermodynamic temperature. A key point in thermodynamics is that energy exchange between the object at least partially determined by the temperature of an object other than the temperature of the object. The temperature of a cup of hot coffee stays hot longer, the ambient temperature around the hot cup of coffee. The temperature of a black hole should be compared with any object surrounding temperature when considering the fate of the black hole. So how to get the temperature of a black hole? Read the rest of this entry »