Hello there, I'm new. I'm a high school student, currently in a physics class, trying to teach himself some basic quantum mechanics. My teacher can offer limited assistance, since she doesn't want to force the rest of class to do this stuff, and considers me slightly mentally ill for attempting to learn it on my own. Can you guys give me any examples of practice problems for the math on things like relativistic momentum, photon energy, and photon momentum? Preferably with explanations of the theories behind the equations? Thanks for reading.