> This is quite analogous to linear momentum being the generator of translation, yet having mysterious components in E&M that aren't a particle moving, but char

> This is quite analogous to linear momentum being the generator of translation, yet having mysterious components in E&M that aren't a particle moving, but charge interacting with the somewhat inscrutable "vector potential" As someone who mostly just coasted in my two required physics courses in college and had no interest to study it further, this isn't really _that_ much more "obviously correct" to me than the first quote about angular momentum. Having never heard the term "generator of translation" or anything like it before, I wouldn't have been able to tell if was a rigorous, well-defined term or made up pseudoscience buzzwords before reading this thread.