The Feynman Lectures of Physics

Feynman • Leighton • Sands

Now, anyone with internet access and a web browser can enjoy reading² a high quality up-to-date copy of Feynman's legendary lectures.

This edition has been designed for ease of reading on devices of any size or shape; text, figures and equations can all be zoomed without degradation.³

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 Time, Robert Leighton (left) and Matthew Sands (right) in background, April 29, 1963.

Photographs by Tom Harvey. Copyright © California Institute of Technology.

Contributions from many parties have enabled and benefitted the creation of the HTML edition of The Feynman Lectures on Physics. We wish to thank

• Carver Mead, for his warm encouragement and generous financial support, without which this edition would have been impossible,

• Thomas Kelleher and Basic Books, for their open-mindedness in allowing this edition to be published free of charge,

• Adam Cochran, for tying up the many slippery loose ends that needed to come together in order for this edition to be realized,

• Alan Rice for his steadfast enthusiasm for this project, and for rallying the support of Caltech's Division of Physics, Mathematics and Astronomy.