The Feynman Lectures

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Richard Feynman's legendary physics lectures, transcribed and free.

Why it made the cut

Richard Feynman's original Caltech physics lectures, transcribed, fully illustrated, and put online free by Caltech itself — not a paraphrase, the actual source material still used as a foundational physics text decades later.

Try it when you're In awe Curious

Visit feynmanlectures.caltech.edu