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If a black hole is a true singularity, then it seems that infalling matter (infalling from some accreation disc, assumibly) would have to reach superluminal velocity just to pass into the actual singularity horizon. (assuming matter is not taking a direct shot at the singularity..I don't think its possible anyway). This is a problem because it would be going backwards in time and would never actually combine with the hole itself. It would orbit, near the speed of light, but never cross? How does matter overcome the angular momentum and still obey our known laws of physics and crash the singularity border?

2007-01-02 15:42:02 · 4 answers · asked by Bernard B 3 in Science & Mathematics Astronomy & Space

4 answers

All events beyond the event horizon of a black hole can not be determined, including what happens to the matter drawn into that region. Theoretically (..Einstein's relativity..) matter can never reach the conjectured singularity because from our reference frame the progression of time for that matter stops. Even the concept of a singularity at the heart of a black hole can't be accepted because such a thing would contain infinite mass 'contained' within zero volume...clearly impossible.

2007-01-02 15:58:59 · answer #1 · answered by Chug-a-Lug 7 · 1 0

ok although the mass of a black hole is a true singularity, the event horizon is not. Imagine a beach ball with a peanut in the middle, the peanut represents the singularity, and the surface of the beach ball is the event horizon--the points in space where gravity is so strong light itself cannot escape it. Thus angular momentum is overcome, the universe is working, ect ect ect.

2007-01-03 00:42:36 · answer #2 · answered by llloki00001 5 · 0 0

a particle coming near the event horizon must not necessarily be speeded up near C to cross the horizon, and if so
i would take into account that matter near the speed of light has an increased mass thus being stronger attracted by gravity.
this will bend the particles path right into or under the event-horizon.
But before this happens the particle may also loose energy by radiating it off, or in collisions with other particles.

i cannot really follow you point of view in this, it seems you mess up with inertial frames, telling the particle will never reach the event horizon.. sure it does.. its just a question which inertial frame you take into account. if YOU are the particle you cross the horizon, once accelerated .. period
if you observe the particle along its trajectory you'll never really see it disappear, cause it looks like time freezes in for your particle. Its hard to imagine that BOTH inertial frames are valid at the same time.

2007-01-03 00:24:42 · answer #3 · answered by blondnirvana 5 · 0 1

Matter does not cross the event horizon. As it approaches the event horizon, time slows down--the closer to the even horizon, the slower time passes. So it never reaches this point.

2007-01-03 03:46:07 · answer #4 · answered by NotEasilyFooled 5 · 0 1

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