B Black Holes Must Have Singularities Says Einstein Relativity

[Space_Girl]

https://www.forbes.com/sites/starts...-singularities-says-einsteins-relativity/amp/

 

[Ibix]

Did you have a question?

 

[mathman]

Singularities in relativity illustrate a breakdown in the theory.

 

[EmileJ]

If I understand correct general relativity predicts a point of infinite density at the center of a black hole and this result can't be what is really going on. Questions: is this correct? Also why wouldn't the the mass inside a black hole keep contracting, only reaching infinity after an infinite amount of time?

 

[Ibix]

If I understand correct general relativity predicts a point of infinite density at the center of a black hole and this result can't be what is really going on. Questions: is this correct?

No. A black hole doesn't have a center in this sense. The singularity occurs in the future of anything crossing the event horizon - ending up there is as inevitable as Monday morning. And the problem with our existing model is that the singularity, where all infalling matter must end up, isn't part of the model. So we don't really know how to describe it. Infinite density doesn't really make sense because there isn't a well-defined volume for the mass to be in.

Also why wouldn't the the mass inside a black hole keep contracting, only reaching infinity after an infinite amount of time?

See above. But we can model what happens to matter crossing the event horizon, and it reaches the singularity in finite time by its own clocks, at least according to General Relativity.

 

[newjerseyrunner]

It is often the case where a theory predicts something going to infinity. It’s always been a simple case that our theory was incomplete.

Here is another type of singularity: fluid dynamics would calculate the waves meeting at a point with an infinite amplitude. Obviously that theory breaks down since there is no actual infinity. There are molecules affecting its behavior. We don’t know what the universal equivalent of a molecules in spacetime is, but we suspect that we’ll eventually figure it out and those pesky singularities will go away.

 

[PeterDonis]

Thread closed for moderation.

Edit: The thread topic has been addressed and the thread is inviting speculation/misinformation. The thread will remain closed.