Why would you care for an undergraduate ranking in Physics?
Don't you think graduate school matters more than undergraduate in physics? If your research is good enough and GPA, PGRE, more than likely you will get into most competitive schools (my assumption from what I have been reading recently).
But I'd like to hear others who know a few things here, does undergrad. even matter (physics)? (Of course, I and assuming the OP aren't going to any hole in the wall schools that are sketchy and in the top 50)