These lectures are different from his famous Lectures on Physics. The lectures you linked to were compiled in "Character of Physical Law" and are not related to

These lectures are different from his famous Lectures on Physics. The lectures you linked to were compiled in "Character of Physical Law" and are not related to his Caltech undergraduate courses where he presented his "Lectures on Physics" content. You link to: https://en.wikipedia.org/wiki/The_Character_of_Physical_Law https://en.wikipedia.org/wiki/The_Character_of_Physical_Law "Feynman Lectures on Physics" are: https://en.wikipedia.org/wiki/The_Feynman_Lectures_on_Physics https://en.wikipedia.org/wiki/The_Feynman_Lectures_on_Physic...