<p>“Theoretical physics” isn’t a major. First you pick a field, i.e. condensed matter, optics, astro, gravity, high energy, nuclear, superconductivity, the list is long and varies from school to school.</p>
<p>Then you decide theory or experiment <em>in that field.</em> And if you’re fortunate you actually get accepted into a research group based on your most preferred specialization.</p>
<p>I skipped over the fact that “nobody” gets a Masters in physics in America, they get a PhD because then they don’t pay tuition.</p>