For comments or questions about this edition please contact The Feynman Lectures Website. Richard Feynman talking with a teaching assistant after the lecture on The Dependence of Amplitudes on …

These are the tape recordings of Richard Feynman's 1961-64 Caltech Introductory Physics lectures, which form the basis of the books The Feynman Lectures on Physics and Feynman's Tips on …

The Feynman Lectures On Physics are known worldwide as a classic resource covering practically the entire domain (up to 1961-1963, the era in which the lectures were given) from the most basic …

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Richard Feynman talking with a teaching assistant after the lecture on The Dependence of Amplitudes on Time, Robert Leighton and Matthew Sands in background, April 29, 1963.

About the notes These are notes Richard Feynman made in 1961-64 to plan and prepare lectures for Caltech's two-year introductory physics course.

The original tape recording of this lecture suffered some damage in the making, so it sounds 'clipped' in many places, particularly when Feynman speaks loudly. (This is the only recording in the collection …

There is one lucky break, however—electrons behave just like light. The quantum behavior of atomic objects (electrons, protons, neutrons, photons, and so on) is the same for all, they are all “particle …

19–1 A special lecture—almost verbatim 1 “When I was in high school, my physics teacher—whose name was Mr. Bader—called me down one day after physics class and said, ‘You look bored; I want …

8–1 Amplitudes and vectors Before we begin the main topic of this chapter, we would like to describe a number of mathematical ideas that are used a lot in the literature of quantum mechanics. Knowing …