Is there a contradiction between the theory of bigbang and a blackhole?

Question

for blackhole is made by denser body of mass that accelerates and collides the particle at the center of lt....while as i think of bigbang,it is like more denser compare to a blackhole with an enormous mass that would create a great gravity that can accelerate a particle at a very high speed same as blackhole?

5 hours ago - 3 days left to answer.

Answer 1

No.

A black hole is simply a region in space where the escape velocity is greater than the speed of light, as seen from our frame of reference (outside that region).

By that definition, (without the final bracket), the universe would itself be a black hole, simply because nothing can escape the universe (the universe being defined as everywhere and everything).

The Big Bang theory simply describes what happens to a universe that expands (and cool) from an initial state of unbounded energy density (a.k.a. temperature).

The Big Bang theory is the collection of knowledge (usually as equations) from all branches of science (physics, chemistry...), applied to a hypothesis -- originally, The Primordial Atom Hypothesis.

As for the behavior of particles 'inside' a black hole (I assume you mean inside the event horizon), I do not know if your description applies.  Not because I think it is wrong, but rather because we simply do not know.

The event horizon is called that because we cannot get any information from inside that (except for whatever little we can gain from Hawking radiation, which has yet to be observed).

From our frame of reference (outside), any object that falls "into" a black hole will appear to have a slower and slower time flow, until this time flow stops completely right at the event horizon.

After that (at least in equations), it is as if time and space coordinates swapped roles.  The object would be free to move in time, but not in space.

What does that mean to the behavior of whatever is left of the matter (after the tidal forces have had their fun)? We don't know.

One good guess is that the fabric of space itself gets stretched as fast as the speed of matter falling towards the "singularity", so that (from the inside) the point towards which you'd be falling actually appears to always be at the same distance or even further -- in other words, it would take an infinite time to "collide" with the centre thing, whatever it could be.

In the meantime, the falling object would continue to be torn apart by the tidal effect.  Any object with a non-zero size would be stretched much more at the leading edge than at the trailing edge -- atoms, even quarks would eventually be torn apart and broken down into... whatever.

But that is only one guess of many.

Answer 2

The idea that all the mass of the Universe (including all the current black holes) was at one point suggests that it should have collapsed into a black hole instead of expanding.

However, this isn't what the Big Bang theory says.  It says that the Universe was denser and hotter in the past.  Some extensions to the theory guess that 4 dimensional branes collided to create our Universe, or that only a small mass was randomly created from the quantum foam - but as it warped space, more matter was created - which created more space, and so on.  There are many such ideas.  Some of these ideas can be tested by study of the cosmic microwave background radiation (CMBR).  Others depend on more detailed knowledge of quantum mechanics or a unified quantum gravity theory.  Most can not yet be tested.

Answer 3

I don't think so

the big bang is a theory related to the exspantion of space where a black hole is where the gravatational pull of an object is more than the speed of light

an object can be in orbit about a black hole as it only atracts objects through gravity.it dosn't drag in space around it.

the big bang theory (I may have this wrong as I am no professor on this?)

is where space itself exspands from a single piont taking gravatational effects along with it.two objects travel away from each other because the space between them exspands.gravity may slow down this exspantion over time but is carried along with it.

Answer 4

The comparison is closet except there was nothing here before the big bang.