AMA | October 2024

2173.323 - 2196.694 Sean Carroll

Electric charge is associated with gauge transformations, etc. Okay, but there are two subtleties here. One is, what do we mean by the laws of physics remaining invariant? So to Sandro's question, in the blog post about energy not being conserved in general relativity, as I actually encourage you to read the blog post, it says something that is relevant to what I said earlier about entropy.