I have been assigned to research one of three topics as a term paper. This is for an upper level undergraduate course in electromagnetism. Could you advise me on which topic best aligns with research in photonics? Hall Effect: Research the classical, quantum, and anomalous Hall effect. Aharonov-Bohm effect: The B field outside an infinite solenoid is zero, but the magnetic vector potential is nonzero. Describe the AB effect and current developments in research. Magnetic monopole: Describe the search for the monopole and it's potential impact on theory if discovered. I already know about the classical Hall Effect. It's the most familiar topic, yet I'm looking to put time into researching the most interesting of the three. I'm joining a photonics lab. Other interests would include nuclear physics and QFT.