I know the phrase ''theoretical physicist'' may be a general term, do they or ''mathematical physicists'' use significant figures? I know it's kind of a silly question, but it stems from what I learned in chemistry class. Our chemistry teacher talked about the importance of such things and I understood pretty well. But I plan to work in high energy theory in the future. So would I be using this concept frequently in my calculations or is it a useful thing to know but won't really use it? Thanks.