The Naked Scientists

The Naked Scientists Forum

Author Topic: If a black holes sucks in matter where does it go?  (Read 313 times)

Offline thedoc

  • Forum Admin
  • Administrator
  • Sr. Member
  • *****
  • Posts: 511
  • Thanked: 12 times
    • View Profile
Paul Hicks asked the Naked Scientists:
   If a black hole sucks in matter. Where does it go?. Does it get funnelled to an alternative Universe?
What do you think?
« Last Edit: 17/10/2016 10:53:01 by _system »


 

Offline evan_au

  • Neilep Level Member
  • ******
  • Posts: 4130
  • Thanked: 249 times
    • View Profile
Re: If a black holes sucks in matter where does it go?
« Reply #1 on: 18/10/2016 11:01:16 »
We have yet to view a black hole close up, but theory predicts that the gravitational attraction of the black hole will increase in step with the amount of matter that it ingests.
- So to an observer outside the event horizon, the mass acts as if it is still at the center of the black hole.

Spacetime is badly distorted in the vicinity of a black hole (especially if it is rotating rapidly).
- Presumably it is even more distorted inside the event horizon
- What this would look like to someone entering a black hole is a matter for speculation.
- All we can say is that if the Big Bang was as dense as theory predicts, it would have formed a black hole, and we would still be inside it.
 

Offline zx16

  • Full Member
  • ***
  • Posts: 95
  • Thanked: 4 times
    • View Profile
Re: If a black holes sucks in matter where does it go?
« Reply #2 on: 19/10/2016 19:11:18 »
Probably the matter stays where it is, albeit in an ultra-compressed form.  Like in a neutron-star, but even more compressed,  so as to make a kind of quark-star.

Wouldn't this provide enough gravitational force to stop light escaping from it, so making it a "black-hole" to outside observers.  Also a hugely powerful gravitational pull.

But the matter would still be here in our present Universe.

Is there any need to imagine that the matter has somehow shrunk into a zero-dimensional mathematical point, or "singularity"?

 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 12001
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Re: If a black holes sucks in matter where does it go?
« Reply #3 on: 30/10/2016 09:09:42 »
A black hole can grow. If now the mass would pass its event horizon to disappear from our knowledge into some connected 'white hole' somewhere else, why would it grow at all? We've found massive 'black holes' inside our own galaxy. you can possibly think of a black hole as also being a white in that it mirrors it, as well as we have hawking radiation leaving it, presumably. Then you have those thinking of it in terms of observer dependencies (time dilations), in which case the gravity surrounding this black hole, from your local measurements/ perspective far away, 'slows' the infalling matter down to such an extent that nothing really happens, it never pass that event horizon according to you. That doesn't mean that this black hole won't grow though. Black holes are hungry.
 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 12001
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Re: If a black holes sucks in matter where does it go?
« Reply #4 on: 30/10/2016 09:15:22 »
There are differences between entanglements, and the idea of a black hole being connected to a white through 'tunneling' or 'Einstein-Rosen Bridges'. Entanglements exist 'here', inside SpaceTime. Tunnelings don't seem to need it? We've never found a 'white hole' spewing out all that energy, as far as I know?
=

Why white holes are theorized is due to 'time symmetry'. If a Black hole can exist, then so should its opposite (time reversal). So purely mathematically you don't need that Einstein-Rosen bridge connecting it, well, possibly? A Black holes event horizon isn't 'needed' either according to some (naked singularity), but as light shouldn't return to you at some observer defined distance that should become your 'event horizon' anyway, (I don't see how it could return myself)? You can furthermore argue that a White hole is 'forbidden' practically as soon a (one way) arrow comes to be.

https://en.wikipedia.org/wiki/T-symmetry

« Last Edit: 31/10/2016 22:25:06 by yor_on »
 

The Naked Scientists Forum

Re: If a black holes sucks in matter where does it go?
« Reply #4 on: 30/10/2016 09:15:22 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums