In Brief
Caltech and The Feynman Lectures website have collaborated to put a series of remarkable lectures from legendary physicist Richard Feynman online completely free of cost.

A Free Education

The Feynman Lectures is one of the most popular lecture series in physics. It’s a great resource for science enthusiasts, students, and teachers, and each lecture is just fantastic in general. Now, Caltech and The Feynman Lectures website have collaborated to put these lectures online completely free of cost.

The lectures themselves were first presented at Caltech in the 1960s by the legendary physicist Richard Feynman. The lectures have since been combined into a three-volume book. To date, about 1.5 million English copies have been sold, but now that it’s free, that number will probably stagnate.

You can start with Volume 1, Volume 2, or Volume 3 of the book via the lecture series’ website or simply watch the lectures below. They contain the same information as the books, so you can actually feel like you were sitting in Feynman’s class when he gave his lectures 50 years ago.

Lecture 1: The Law of Gravitation

Lecture 2: The Relation of Mathematics to Physics

Lecture 3: The Great Conservation Principles

Lecture 4: Symmetry in Physical Law

Lecture 5: The Distinction of Past and Future

Lecture 6: Probability and Uncertainty — The Quantum Mechanical View of Nature

Lecture 7: Seeking New Laws