(June 11, 2012) Leonard Susskind discusses plane electromagnetic waves in regards to Maxwell's equations. He then looks for a Lagrangian formulation of Maxwell's equations in order to support the laws of conservation. In 1905, while only twenty-six years old, Albert Einstein published "On the Electrodynamics of Moving Bodies" and effectively extended classical laws of relativity to all laws of physics, even electrodynamics. In this course, Professor Susskind takes a close look at the special theory of relativity and also at classical field theory. Concepts addressed here include space-time and four-dimensional space-time, electromagnetic fields and their application to Maxwell's equations.