coquelicot's latest activity

This seems interesting. I sent you a direct message to your inbox, as this kind of discussion usually leads to non main-stream...

Thinking about this a little more... For the laws of physics to be expressed covariantly, we'd have to add not just a curl-term to the...

Thank you so many for these references. I was unaware of them. Regarding the paper of U. Backhaus and K. Schäfer, it can be read online...

I briefly looked at some GR books for an explanation but didn't find anything. I had better luck with graduate-level E&M books; in...

Yes, but it depends on what you call "justified". The fact that an equation is derived from a well established theory certainly means it...

Einstein's field equations, which govern GR, use the Stress-Energy Tensor. The SET is required to be symmetric and gauge-invariant...

Thank you again for this very insightfull answer. I now understand that the "proof" of Jackson for the form of the Poynting vector is...

Thank you for your answer. I would appreciate something more detailed though, as I am not that good at GR.

I'm currently away from my copy of Jackson's, so I can't look it up. However, note that in classical physics, QM and QFT we can add a...

The Poynting vector is a definition, that is supposed to represent the energy flow at each point. Unfortunately, the only observable...