lecture goals

• Learn the names of Gauss and Maxwell, and a bit about their contributions to physics.
• Learn about the four laws of electricity and magnetism as they were before Maxwell's work. Learn what each law is telling us.
• Learn about the four laws of electricity and magnetism as they were after Maxwell rewrote them in terms of fields.
• Understand the meaning and significance of displacement current.
• Understand how Maxwell realized that light is an electromagnetic wave (although we don't do waves until the next three lectures).
• Learn what we mean by a unified field theory. It's a very important 20th century concept.