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View Full Version : Is mainstream model of blackholes as viewed from infinity?



WaxRubiks
2017-Feb-04, 04:40 AM
I was wondering the other year if the black hole model, was as seen by an observer, at an infinite distance......is that so?I

Shaula
2017-Feb-04, 06:59 AM
Nope. If that were the case then the simulations they used to generate the graphics for Interstellar would lead to a rather less interesting view!

Edit to add: The models do contain a number of quantities that asymptotically approach zero, that is to say go to zero at infinity, but this is not equivalent to being the view from infinity.

bruno
2017-Feb-04, 08:09 AM
I don't understand the question?

WaxRubiks
2017-Feb-04, 08:51 AM
I don't understand the question?


Yes, I think the question needs some more work. Just ignore it, if you like.

bruno
2017-Feb-04, 08:54 AM
I apologize what I meant was can someone explain it to me?

WaxRubiks
2017-Feb-04, 08:57 AM
Well, I was thinking about gravitational self-magnification again, which would be complete at infinity..

Shaula
2017-Feb-04, 09:37 AM
Well, I was thinking about gravitational self-magnification again, which would be complete at infinity..
The zero point for gravitational potential is also at infinity - doesn't mean that all our models of the Earth's gravity are from the perspective of an observer at infinity!

01101001
2017-Feb-04, 10:57 AM
Potential context:



Gravitational lensing(or light path bending) and the apparent size of objects (http://forum.cosmoquest.org/showthread.php?84999-Gravitational-lensing(or-light-path-bending)-and-the-apparent-size-of-objects) (2009)
Light paths, and self magnification (https://forum.cosmoquest.org/showthread.php?128627-Light-paths-and-self-magnification) (2012)

WaxRubiks
2017-Feb-04, 11:36 AM
I havent moved on much, have I.....