1. What is the Compton Effect? What are the implications for the Compton Effect for physical theory? (That is, can you describe the Compton Effect in classical terms? In Quantum Mechanical terms? If so, how; if not, why not?)
2. What is the photoelectric effect? How can the photo electric effect be described in classical terms (if it can)? How can it be explained in quantum mechanical terms?
3. What is blackbody radiation? How does classical theory describe blackbody radiation? How does quantum theory?