Last fall, we let you know that Caltech and The Feynman Lectures Website joined forces to create an online edition of The Feynman Lectures on Physics.
They started withVolume 1. And now they’ve followed up with Volume 2 and Volume 3,
making the collection complete.

First presented in the early 1960s at Caltech by the Nobel Prize-winning physicist Richard Feynman, the lectures
were eventually turned into a book by Feynman, Robert B. Leighton, and Matthew Sands. The text went on to become arguably the most popular physics book ever written, selling more than 1.5 million copies in English, and getting translated into a dozen languages.

The new online edition makes The Feynman Lectures on Physics available in HTML5. The text “has been designed for ease of reading on devices of any size or shape,” and you can zoom into text, figures and equations
without degradation. Dive right into the lectures here. And if you’d prefer to see Feynman (as opposed to read Feynman), we would encourage you to watch ‘The
Character of Physical Law,’ Feynman’s  seven-part lecture series recorded at Cornell in 1964.

The Feynman Lectures on Physics is now listed in our collections of Free eBooks and Free
Textbooks.

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