I had posted this in the wrong thread before I believe, so I moved it here. This is my first post, so I hope I am following the guidelines. I have a bachelors degree in Physics and a minor in math which I completed back in 2000. Back then I was sort of an average student, but I also did laser research in the lab, so I learned about laser crystals and such. Now, I want to catch back up, and learn electromagnetic physics such as how light propagates through a medium, and it’s electrical and magnetic properties. I want to revisit simple things like simple harmonic motion, since even these are difficult for me to derive after so long. I went through 4 calculus classes, so I can’t understand why I’m having so much trouble with even simple limits and such. My focus now is to relearn the Maxwell Equations, and to apply them to how light is affected when it goes through clear quartz. I guess my questions could be summed up as: 1) Do I need to memorize all the “building block” math parts such as the product rule, summations and series, and all the other basic rules of math? 2) Where is a good source on understanding Maxwell Equations? I printed the Wikipedia article, and another one that derives the equations. 3) Is it possible that since I had done them before, I might pick up the stuff more easily than I did? I had some trouble then fully grasping the subject matter. For some reason I feel so dumb because even with my bachelors I can’t solve simple limits or do more than just the basic factoring of quadratics, or at least I haven’t put enough effort. I don’t have any textbooks anymore, so I don’t really have direction. My goal eventually will be to go back to school into the Physics Master’s program, but I need to understand the basics. I must not have been all bad to have made a B in Quantum Mechanics for instance. I remember bits and pieces of the Schrödinger equation, which I think described the wave equation of a hydrogen’s electron spinning around an atom. I will be doing research in the laser lab, and would probably want to focus on how the magnetic field of light can be affected or shifted. So about ½ theoretical calculation and ½ research. I look forward to anyone’s guidance.