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Author Topic: Why can't light escape a black hole?  (Read 2392 times)

Offline zanyquack

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Why can't light escape a black hole?
« on: 11/03/2014 18:48:15 »
I was just recently thinking about how the speed of light is the "absolute maximum" in the universe and how anything with mass can't go the speed of light. If it really is the "absolute maximum", why can't anything going at the speed of light escape a black hole? Does Einstein's theory not apply here?


 

Offline Themis

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Re: Why can't light escape a black hole?
« Reply #1 on: 11/03/2014 20:16:48 »
Hello
Light can escape from a black hole only the nature of a black hole is to compress itself to a point where actually turns inside out and into a brand new dimension. So light can only escape when the time is right. Only they don't know this yet.
 

Offline DanielB

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Re: Why can't light escape a black hole?
« Reply #2 on: 11/03/2014 20:42:17 »
Hello
Light can escape from a black hole only the nature of a black hole is to compress itself to a point where actually turns inside out and into a brand new dimension. So light can only escape when the time is right. Only they don't know this yet.



Light cannot escape from a black hole, the sheer density of the material inside the core, along with hyper rotation induce a gravitational force strong enough for Gravitational Hyper compression, to create fusion. 

It is not possible for light to escape.   It has nothing to do with the speed of light, at 700,000,000 miles an hour.   

It has to due strictly, with the amount of gravitational force, that is being generated only. 


A black hole does not turn itself inside out, and is not another universe. 

(In it were a alternate Universe,, physic's, would be thrown away and no structure or reason to the Universe would exist.. And there fore,, the Universe wouldn't be here either.  Because structurally, if the laws of physics are thrown out, it would be incapable of existing.
 

Offline flr

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Re: Why can't light escape a black hole?
« Reply #3 on: 12/03/2014 21:02:24 »
If BH evaporates via Hawking radiation, then all energy that goes into a BH eventually is released back. So, in some sense, the energy carried by light will eventually escape the BH. 
 

Offline jeffreyH

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Re: Why can't light escape a black hole?
« Reply #4 on: 14/03/2014 10:45:24 »
The escape velocity equals the speed of light at the event horizon. Therefore light would have to travel faster than c to escape. Interestingly time becomes dominant inside a black hole. You can model this theoretical behavior using a modified form of Minkowski diagrams.

http://en.wikipedia.org/wiki/Penrose_diagram
 

Offline percepts

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Re: Why can't light escape a black hole?
« Reply #5 on: 16/03/2014 15:56:46 »
Light as you put it, is actually just a distubance in the electromagnetic field in a certain band of wavelengths. Higher energy wavelengths can escape a black holes visible event horzon (wavelngths in the human visible wave length band). The event horizon for higher energy wavelengths will be nearer to the black hole.
So what does this tell us? Well it tells us that electromagnetic field is affected by gravity and when gravity is great enough it overcomes the electromagnetic fields ability to escape. i.e. it gets sucked into the black hole. So the normal form of a spreading wave is changed to be in one direction only. i.e. towards the center of the black hole.

At least that is how I percieve it.
« Last Edit: 16/03/2014 15:58:47 by percepts »
 

Online evan_au

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Re: Why can't light escape a black hole?
« Reply #6 on: 17/03/2014 17:52:09 »
Jeffrey, you may be interested in the progress of someone else who is working on quantum gravity; an interesting article at:
https://www.simonsfoundation.org/quanta/20140314-betting-on-the-future-of-quantum-gravity/
 

Offline jeffreyH

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Re: Why can't light escape a black hole?
« Reply #7 on: 17/03/2014 19:43:05 »
Jeffrey, you may be interested in the progress of someone else who is working on quantum gravity; an interesting article at:
https://www.simonsfoundation.org/quanta/20140314-betting-on-the-future-of-quantum-gravity/

Good grief! "Gravitons behave like two copies of gluons". That is a startling find. Thanks for the link. I have bookmarked it. So asymptotic freedom may play a part in gravitation via supergravity!
 

Offline jeffreyH

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Re: Why can't light escape a black hole?
« Reply #8 on: 17/03/2014 21:47:49 »
Light as you put it, is actually just a distubance in the electromagnetic field in a certain band of wavelengths. Higher energy wavelengths can escape a black holes visible event horzon (wavelngths in the human visible wave length band). The event horizon for higher energy wavelengths will be nearer to the black hole.
So what does this tell us? Well it tells us that electromagnetic field is affected by gravity and when gravity is great enough it overcomes the electromagnetic fields ability to escape. i.e. it gets sucked into the black hole. So the normal form of a spreading wave is changed to be in one direction only. i.e. towards the center of the black hole.

At least that is how I percieve it.

Well the gravitational force overcoming the electromagnetic carrier particle, the photon, is an interesting topic. It requires the escape velocity to exceed c. In the case of a magnetic field what happens? Do we see a magnetic field expressed around the black hole. The evidence points to this. This field appears to be unaffected, unless it is a remnant. However a remnant would decrease over time. Is this what is observed?

On the other hand this field could be generated by the accretion disk. The strength of the field seems to negate this option unless there is more mass compacted into the disk than we currently imagine.
« Last Edit: 17/03/2014 21:50:09 by jeffreyH »
 

Offline jeffreyH

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Re: Why can't light escape a black hole?
« Reply #9 on: 18/03/2014 00:37:42 »
As gluons are spin 1 then a graviton being like two copies of a gluon could gain spin 2. If  instead of viewing a black hole with a singularity but a progressively slowing collapse due to intensified gravitational feedback, then the field would covert the whole compressed mass into something resembling a macroscopic particle. Something much like the colour charge confinement could them take over which operates on all particles within its range including photons. There would need to be a lot of work on the relationship between mass density and field strength before these theoretical views could be confirmed. My take on this is that, for Schwarzschild compression, lower density, large masses are valid as black holes and high density, smaller masses are barred from forming black holes. Which is why we have limits such as Chandrasenkhar's. The exact value of this density boundary would need to be determined.
 

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Re: Why can't light escape a black hole?
« Reply #9 on: 18/03/2014 00:37:42 »

 

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