The American University Caltech has made available the audio recordings (1) of the introductory physics lessons, given by the well-known, brilliant and extravagant prof. Richard Feynman during the three-year period 1961-64.
The recorded lessons include both the actual lesson and the discussions between prof. Feynman and his students and / or colleagues at the end of the lessons. This previously unpublished material is now available and searchable.
Among these recordings can also be found three entire recordings of lectures never heard before outside of Caltech, including lectures on quantum given by prof. Feynman in 1964.
A web page is associated with each audio lesson where you can find information on the material discussed in the lessons.
“If only information all knowledge went into cataclysm, and a sentence could be scientifically transmitted to subsequent generations, which statement would contain the maximum amount of in the minimum number of words? I believe that it would be the atomic hypothesis (or atomic factual, or whatever we want to call it) according to which all things are made of atoms, small particles that stir with a perpetual motion, attracting each other when they are a little distant from each other. other, but repelling each other when they are crushed against each other. In this single sentence there is an enormous amount of information about the world around us, if only we reflect on it with a little imagination. " -Richard Feynman, Six Easy Pieces, 1994-
The audio lessons and the attached material can be consulted at the link: https://www.feynmanlectures.caltech.edu/flptapes.html