From the Vega Science Trust:
A set of four priceless archival recordings from the University of Auckland (New Zealand) of the outstanding Nobel prize-winning physicist Richard Feynman – arguably the greatest science lecturer ever. Although the recording is of modest technical quality the exceptional personal style and unique delivery shine through.
The Douglas Robb Memorial Lectures: Part 1 : Photons – Corpuscles of Light
A gentle lead-in to the subject, Feynman starts by discussing photons and their properties.
The Douglas Robb Memorial Lectures: Part 2 : Fits of Reflection and Transmission – Quantum Behaviour
What are reflection and transmission, and how do they work?
Electrons and their Interactions: The Douglas Robb Memorial Lectures – Part 3
Feynman diagrams and the intricacies of particle interaction.
New Queries: The Douglas Robb Memorial Lectures – Part 4
What does it mean, and where is it all leading?
More here. [Thanks to Fernando Carlos Spaulding.]