Black holes question

[samid]

Hi everybody,

 

The question I wanted to clarify is the following: does the black hole interact with any other objects in the space via the eloctromagnetic force?

 

There are two contradictory clues I have on my mind.

 

First of all, the overall electric charges is conserved during any kind of transformations of a substance. So, the evident answer is yes, there are electromagnetic intercations with the black holes and, say, the travelling protons.

 

Secondly, the electromagnetic interaction is a field, which is both a particle and a wave. A particle, associated with the electromagentic field is a photon. But a photon cannot escape the black hole event horizon. So, the answer is no.

 

I'm not an astronomer (I'm a numerical analysis specialist) and maybe the thing I am asking is evident. Anyway, please, provide your answers with the links, if this is possible.

 

Thanks,

Dmitry

[mathematic]

I don't fully understand your commentary. However the short answer to your question is that black holes intereract with the outside only through gravity.

[samid]

Thanks, mathematic! Could you please provide me with a paper on this I could refer to for exploring this further?

 

The only concern I had about this issue is that the black hole does have a charge, since it has collapsed from a charged object (a star). Without any doubt, the gravity is the major impact of a black hole, but this does not mean, that this is the only one.

[ajb]

I don't fully understand your commentary. However the short answer to your question is that black holes intereract with the outside only through gravity.

Black holes can be electrically charged, though one would expect any physical black hole to be near enough neutral.

[mathematic]

Thanks, mathematic! Could you please provide me with a paper on this I could refer to for exploring this further?

 

The only concern I had about this issue is that the black hole does have a charge, since it has collapsed from a charged object (a star). Without any doubt, the gravity is the major impact of a black hole, but this does not mean, that this is the only one.

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

You can start here.

 

Stars and black holes are electrically neutral. You may misunderstand star composition. Stars are essentially plasmas, in that they the atoms are highly ionized, but the totality is still 0 net charge.