Posts by dmckee
There is no problem with the approach you suggest: it's equivalent to deciding to use seconds and light-seconds as your units for space-time four vectors instead of light-meters and meters. (I actu...
The experience we had on the physics site Somewhere Else may be instructive (I've already written a little about it on Software Meta). In short, against my wishes they were allowed but because ther...
Answering from the point of view of a particle physicist. Meaning we consider an event where and electron and proton approach each other in an initially free condition (not already bound). Electro...
Olin and Derek have covered the biggest part of this: the combination of energy and momentum conservation rules out the two-into-one combination of photons that are not co-linear. That might leave...
