Recent content by rwestafer

Maybe a more precise definition of "inertial observer" would help, but is there one? My assumption was the two characteristics given elsewhere on the forum: (a) the observer's frame does not accelerate or rotate, and (b) the observer has mass. The term "dual" can be used in the mathematical...

JesseM, I updated the post to clarify, and thanks for calling attention to detail.

If an inertial "observer" or state has mass and no rotation, then a massless state with rotation (i.e. having maybe a generalized rotation such as "spin," e.g. a photon) seems to be dual to that state. Would this viewpoint then take the photon as a "matching" channel or "process" for...