Reply to Re: Fear and loathing in observable universe
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Scratcher is right, and my original post was correct too. While we are at it, here is some fun stuff I found out about black holes while trying to answer my own question.
1)
Black hole consist of 4 parts. Ergosphere - ecliptical space (due to rotation of black hole) where spacetime moves at the speed of light in direction of black hole's rotation. Event horizon - a sphere shape, and point of no return. To escape from the event horizon, one must move greater than speed of light in opposite direction, which is impossible. Everything bellow event horizon can't be seen, couse... well, duh... light can't escape. Finally, inside event horizon lies 'singularity'. No one knows what it is ,except that it's created by highly compressed matter. It's represented as a dot in the sphere center (event horizon), but since time and space are hugely distorted within black hole (time in black hole passes extremely slow relative to our time), so matter (if it is still matter) position of newly sucked material is questionable, and density cannot be measured. Nor the radius of singularity, at that.
2)
Most pictures of black holes are incorrect representations. Black holes aren't black. They are invisible, sort of. If you watch the sky full of stars and there is a black hole (BH from now on) somewhere in between those stars and you, you would see circle shaped light distortion. Stars directly behind BH would seem larger, distorted, smaller, or not visible at all, depending on the angle at witch their light (electromagnetic wave - EMW) comes from. Like a huge contact lense is between you and them. It's actually possible to (figuratively) shoot a laser beam at BH, and laser beam can rotate 180 degrees and turn back to you, due to space distortion near BH if you can aim it right.
3)
Stars are really hot, because of their huge mass, and pressure, but BHs have just small temperature above absolute zero. Since even light can't escape event horizon, EMWs 'die' when they are sucked. Since heat is also transmitted via EMWs (heat is an EMW at specific wavelenght), BHs are therefore cooler than most of the universe. At least from the outside...
4)
BHs are also emitting EMWs. Hawking proved that. But they are barely observable, because EMW traveling opposite of BH (actually event horizon) start dropping in their frequency due to traveling in stretched space. This is called redshift, and occurs regularly in entire space due to its expansion, but its rapid near BHs. So if EMW was gamma ray at emission, it becomes long wave when he exits ergosphere.
personal observation
I've no idea how can emitted EMW escape event horizon. EMW's frequency has nothing to do with its speed, or how it's even emitted. Aside from that, he is moving from stretched space to less stretched space, so inversed redshift should occur, making wave with higher frequency at the end, than at emission point
5)
BHs spin. Fast. But... If 'stuff' beyond event horizon moves incredibly slowly, due to time distortion(or dilation, whatever), what is exactly spinning over there??? They also calculated that each BH depending on their mass, has their own maximum spin rate, but that's just too confusing, although interesting. I can't explain, so google it if you wanna...
1)
Black hole consist of 4 parts. Ergosphere - ecliptical space (due to rotation of black hole) where spacetime moves at the speed of light in direction of black hole's rotation. Event horizon - a sphere shape, and point of no return. To escape from the event horizon, one must move greater than speed of light in opposite direction, which is impossible. Everything bellow event horizon can't be seen, couse... well, duh... light can't escape. Finally, inside event horizon lies 'singularity'. No one knows what it is ,except that it's created by highly compressed matter. It's represented as a dot in the sphere center (event horizon), but since time and space are hugely distorted within black hole (time in black hole passes extremely slow relative to our time), so matter (if it is still matter) position of newly sucked material is questionable, and density cannot be measured. Nor the radius of singularity, at that.
2)
Most pictures of black holes are incorrect representations. Black holes aren't black. They are invisible, sort of. If you watch the sky full of stars and there is a black hole (BH from now on) somewhere in between those stars and you, you would see circle shaped light distortion. Stars directly behind BH would seem larger, distorted, smaller, or not visible at all, depending on the angle at witch their light (electromagnetic wave - EMW) comes from. Like a huge contact lense is between you and them. It's actually possible to (figuratively) shoot a laser beam at BH, and laser beam can rotate 180 degrees and turn back to you, due to space distortion near BH if you can aim it right.
3)
Stars are really hot, because of their huge mass, and pressure, but BHs have just small temperature above absolute zero. Since even light can't escape event horizon, EMWs 'die' when they are sucked. Since heat is also transmitted via EMWs (heat is an EMW at specific wavelenght), BHs are therefore cooler than most of the universe. At least from the outside...
4)
BHs are also emitting EMWs. Hawking proved that. But they are barely observable, because EMW traveling opposite of BH (actually event horizon) start dropping in their frequency due to traveling in stretched space. This is called redshift, and occurs regularly in entire space due to its expansion, but its rapid near BHs. So if EMW was gamma ray at emission, it becomes long wave when he exits ergosphere.
personal observation
I've no idea how can emitted EMW escape event horizon. EMW's frequency has nothing to do with its speed, or how it's even emitted. Aside from that, he is moving from stretched space to less stretched space, so inversed redshift should occur, making wave with higher frequency at the end, than at emission point
5)
BHs spin. Fast. But... If 'stuff' beyond event horizon moves incredibly slowly, due to time distortion(or dilation, whatever), what is exactly spinning over there??? They also calculated that each BH depending on their mass, has their own maximum spin rate, but that's just too confusing, although interesting. I can't explain, so google it if you wanna...
