8.286 The Early Universe (Fall 2013, MIT OCW). Instructor: Professor Alan Guth. The Early Universe provides an introduction to modern cosmology. The first part of the course deals with the classical cosmology, and later part with modern particle physics and its recent impact on cosmology.
(from ocw.mit.edu)
Lecture 17 - Black-Body Radiation and the Early History of the Universe, Part III
In this lecture, the professor reviewed dynamics of a flat radiation-dominated universe and continued to talk about black-body radiation and the early history of the universe.