Event horizon Definition and 307 Threads

Is the event horizon of a black hole (as seen by an observer at rest relative to the singularity) equivalent to the singularity (as seen by a free-falling observer)? In other words, if the stationary observer watches a rocketship free-fall to near the event horizon then turn on its rockets and...

Was wondering: In Hawkins's " Univers in a nutshell" book, he talks about the behavior ov virtual particle pairs around the event horizon of a black hole. My understanding is that one of the antiparticle of the pair can be absorbed by the black hole. This makes for the release of the particle (...

Was wondering: In Hawkins's " Univers in a nutshell" book, he talks about the behavior ov virtual particule pairs around the event horizon of a black hole. My understanding is that one of the antiparticule of the pair can be absorbed by the black hole. This makes for the release of the...

One of my friend had asked me one question which I did not really have a good answer for. His question was: Why does the antiparticle counterpart of the virtual antiparticle pairs (those that appear due to uncertainty between time and energy) at the event horizon fall into the black hole...

[SOLVED] Two black holes and the event horizon.. What happens if a black hole enters another black hole's event horizon?? I really wonder can matter escape by the gravitational chaos?? I asked this question to the scientist in NASA haven't received the answer yet..But this is a...

All right, physicists claim that mass can be at infinite density. This condition is called the singularity, an one-dimensional point that is having mass (or energy, whatever)inside it. I say mass cannot possibly form singularities. Why? Because of the following: When there is mass inside...

The spacetime geometry outside a black hole may be transformable through the event horizon as the black hole internal geometry, and conversely. Consider Hawking radiation with respect to black hole entropy. While one quantum escapes to universal infinity, the other approaches the...