My situation with LOR are that i have the option for one of them as coming from a physics teacher who only has a masters degree or an ochem professor that has her PHD. Obviously, the PHD would be better given just the choice of the two but the problem is that, although the ochem professor will write me a LOR, she didn't know me as well as the physics teacher and her letter would probably be very basic. However, i know the physics teacher very well and he would write me an awesome letter...so which would be better? All other LOR that i will get will be from PHD professors so one that only has a masters would be better given that it would be a much more quality letter right?