I am an undergraduate student getting ready to apply for graduate school in a few months. I have worked in two jobs in Physics (my desired field), one in experimental and one theoretical. At each job I have at least two people willing to provide reference letters, and I believe all of them would be good references.
Many of the graduate application websites indicated that 2 (or more) letters of reference are required.
When I apply to one of these programs is it better to double down and use 2 letters that apply to the same program (ie, use 2 references from experimental group when applying to an experimental graduate program)? Or would it be better to have a bit of variety (ie, one letter from each group, regardless of whether I am applying to experimental or theoretical)?
I'm leaning towards the variety, because I think that two letters from the same job would end up having the said the same thing, whereas the variety gives the university an idea of my breadth of knowledge.