I've been reading some articles on game physics and came across subjects such as fixed timestep (article). Some of the articles I read mention the "Shannon rule" or "Shannon law" in relation to the length of the timestep. Example quote:
Your timestep should be at least
1 / 120seconds or smaller because of the Shannon rule [...]
Here's an answer here on Gamedev that mentions it. Some quick google searches for "Shannon's law" doesn't seem to yield much result except for this wikipedia article but I'm not sure if that's what is being talked about here.
So what is the Shannon rule / Shannon law?