Can Concentrated Light Create Gravity by Warping Space-Time?

[Hootenanny]

This thread began with the question "Do photons curve space-time?" (or something to that effect). Let us not turn this into a discussion of Invariant vs. Relativistic mass.

 

[anantchowdhary]

So finally is it possible to create a black hole in an arbit situation with the use of just light?

 

[ranger]

So finally is it possible to create a black hole in an arbit situation with the use of just light?

Read this:
http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/black_fast.html

You should think of a black hole as mass concentrated into a signle point rather than your orbit situation.

 

[Chris Hillman]

Vaidya thought experiments

Hi, anantchowdhary,

So finally is it possible to create a black hole in an arbit situation with the use of just light?

Let me rephrase your question: electromagnetic radiation with random polarizations can be treated in gtr as a "null dust". So, is it possible to create a black hole using only the energy contained in a collapsing spherical shell of null dust?

The answer is "yes", as can be seen from the Vaidya null dust, an exact null dust solution which generalizes the Schwarzschild vacuum. In fact, it is well worth studying some scenarios in detail since you can learn much about black holes this way. In particular, we can clearly see the "teleological" nature of the event horizon. See Frolov & Novikov, Black Hole Physics, Kluwer.

 

[SF]

http://www.physorg.com/news87832863.html
Leading physicists convene in Tucson for conference on gravity