Frame dragging from a light beam

[Dmitry67]

Does light beam create linear frame fragging around it?
If answer is positive, can light become 'tired' going thru the universe and exchanging the momentum with the environment via frame dragging?

 

[pallidin]

Just my 2-cents:
I think frame-dragging is a potential consequence of moving mass objects, of which a photon would not qualify.
Could be wrong.

 

[Dmitry67]

Hm... I doubt it.

1. We know that rotating black holes create frame dragging.
2. Based on the 'no hair' theorem it is irrelevant what BH is made of.
3. If could be made of photon gas, for example.
4. Frame dragging can not 'switch on' instantaneously when photon gas cloud became a BH
5. So there was a frame dragging from a very beginning, from the photons.

 

[pervect]

The idea that mass causes gravity is a Newtonian idea. While it's perfectly correct in Newtonian theory, it's not correct in GR. In GR, it's the stress energy tensor that causes gravity. Saying the words "Stress-energy tensor" unfortunately might scare or confuse someone who hasn't studied the theory, but what it means is that anything that has momentum and energy can affect the curvature of space-time. Light certainly has both momentum and energy and thus it can and does affect the curvature of space-time - i.e. cause "gravity".

As far as to the question whether or not light specifically can cause frame dragging, I believe the answer is almost certainly yes, but I haven't calculated it personally.

 

[Dmitry67]

pervect, I googled it a lot, but I did not find an answer.
Could you calculate it?
Because if nswer is YES then light MUST become 'tired'.