Recent content by RMDumse

Consider going to Amazon and doing a search on Julian Barbour. I have a copy of his _Mach's Principle: From Newton's Bucket to Quantum Gravity (Einstein Studies, Vol 6)_ which is out of print but might be availalbe at university libraries, and have pre-ordered _Absolute or Relative Motion: The...

For a while, I had a web link where someone had put up an image of Terrell's original paper. Too bad it was taken down, although it probably was a copyright infringement on Phys. Rev. Anyway, while popularly often presented in the 1960's - 80's mention of Penrose-Terrell rotation has been...

A very simple explanation (perhaps too simple) would be, if there is enough gravitational field on one side of a body to bend light your way, then there will be enough gravitational field on the otherside to bend rays your way. So you will see one image on the central ray (unless the central ray...

So if you take Einstein's box, and put two photons in it, going from opposite sides, would the result be different? Now boast that frame. Are the two photons still in opposition? What changes as the box goes relativistic speeds to the observer?