• QUESTIONS BEFORE LECTURE 39

now think about these

• Why is it hard to write a mathematical description of a black hole or an electron?
• What is the "Standard Model" of Quantum Field Theory?
• What is a virtual particle and what allows it to exist?
• What is the quantum field rule which replaces Newton's Second Law for force, and how is it similar to Newton's Second Law?
• What is the role of electric charge in quantum electrodynamics? How does that mesh with the role of electric charge in classical electrodynamics?
• What is the role of the virtual photon?
• Give the Feynman rules for an external line, an internal line, and a vertex.
• Define what a coupling is.
• What all would be different from classical physics in relativistic quantum field theory?
• Are you a particle or a wave or a field?