# JHU Lectures Fall 2017

Undergraduate lectures, *Johns Hopkins University*, 2017

Based on the general interest of some undergraduate students in the JHU Department of Physics & Astronomy, I gave a series of lectures on special relativity, the least action principle, and classical field theory. The main point was to show how the Maxwell equations and the Einstein equations both arise naturally from an action principle.

The lecture notes are partially gathered from my prior writings, and partially written expressly for this series. They are linked below.