i have a question and i just couldn't get another way to get its answer. My question is regarding black hole and the possibility of a white hole. we know that even light cannot escape a black hole once it crosses its event horizon. now i'd like to think that the gravity that sucks everything corresponds to a force and a velocity which is obviously greater than the velocity of light even more for black holes of massive sizes. now also we know that if i go faster than the speed of light time starts going backward for me. now if this is the case shouldn't black hole formation be highly unstable because every time that gravitational pull force is going to reverse the time so is it possible that the black hole just after sucking the first matter that is itself, starts spitting it out like a white hole possibly does? Or is it that time doesn't revert itself inside the black hole.? I am an engineering student from India with no mathematical knowledge of quantum physics. If there is a theoretical explanation i would really like to know it.

  • $\begingroup$ possible duplicate: physics.stackexchange.com/q/101979 $\endgroup$ – Kyle Kanos Nov 13 '14 at 21:19
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    $\begingroup$ now if this is the case. It isn't the case. Time will never go backward for you since you're always at rest with respect to yourself. Essentially, time and space swap roles, in a certain sense, inside the event horizon. The future direction is towards the singularity and the past direction is towards the horizon. One can no more move towards the horizon than one can move backward in time. $\endgroup$ – Alfred Centauri Nov 13 '14 at 22:30

You say:

now also we know that if I go faster than the speed of light time starts going backward for me

but this is incorrect. It is possible to go back in time by travelling faster than light, but it's a somewhat complicated process. If you're interested, an excellent not too mathematical discussion is given in Time Travel and Warp Drives by Allen Everett and Thomas Roman.

So I'm afraid your question is founded on a misapprehension.


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