WAYS:Light: In General p.01

In General
This is a study in Time:

Richard Feynman, Probability and Uncertainty – The Quantum Mechanical View of Nature delivered at Cornell University, 1964

Richard Feynman, The Douglas Robb Memorial Lectures - Part 1
Photons - Corpuscles of Light , University of Auckland, 1979
(begin at the 20 minute mark)