I'm currently a photonics engineer with a B.S. in Applied Physics. I work full time and have been pursuing an MS in Applied Physics part time and I'm considering enrolling in the Phd program there at George Mason University. Unfortunately, they don't actually offer a Phd in physics, but rather offer a PHd in Computational Science that includes a Computational Physics Concentration. Would I be better served by finishing my MS and then taking the qualifying exam at another school to get a Phd in physics or sticking with GMU for both my masters and Phd?