Okay, second question I have to ask, again, hopefully not stupid. First, I've been perusing the forums and see the common question asked again and again, what's it like for a photon "experiencing" reality, and I totally agree or understand the standard answers: the math breaks down, we...
Hi, hopefully this isn't a dumb question. I've read essentially that in the center of mass/momentum frame an object has invariant mass, and that the system's total mass will be composed of the constituent particles' masses and any other kinetic and potential energies within the system. I also...