RE: Actual Infinity in Reality?
February 21, 2018 at 8:19 am
(This post was last modified: February 21, 2018 at 8:23 am by polymath257.)
(February 20, 2018 at 10:50 pm)Anomalocaris Wrote:(February 20, 2018 at 8:43 pm)Jehanne Wrote: Note -- A "singularity" is an actual infinite!!
If we have no other reason to suspect our theory that arrives at singularity is flawed, then we might think when the theory points to singularity, then an actual infinity is a probability to be taken seriously.
But in case of gravity and blackholes, we actually have strong reason to believe the theory of gravity breaks down well before things reach infinity.
Right. it is likely that quantum effects 'smooth out' the singularities, both at the Big bang and in Black Holes.
Of course, by doing so, you open up the possibility of an infinite past: the past can only be finite if there is a singularity.
(February 21, 2018 at 4:32 am)pocaracas Wrote:(February 21, 2018 at 3:55 am)Anomalocaris Wrote: No. A finite number of things per zero volume is also infinite density.
Aren't we limited by Plack length?
Answer: probably. Again, this is by quantum effects, which tend to smooth out those singularities. We are also probably limited by the Planck density, which is the Planck mass divided by the Planck volume.
If we had a tested theory of quantum gravity, I could give more definite answers, but we don't.