Richard Feynman is considered one of the great physicists of all time.  He studied at MIT and Princeton and worked at both Caltech and Cornell.  Feynman famously worked on the Manhattan Project during World War II.  He also led the committee the investigated the Space Shuttle Challenger disaster in 1986.  Richard Feynman won the Nobel Prize in 1965 for his work in Quantum Electrodynamics.  His work in the 20th century is a must for anyone entering the field of physics.

Feynman's published lectures are available for free from Caltech.  

Feynman's brilliant recorded lectures are below.

Lecture 1 - The Law of Gravitation

Lecture 2 - The Law of Gravitation (continued)

Lecture 3 - The Great Conservation Principles

Lecture 4 - Symmetry in Physical Law

Lecture 5 - The Distinction of Past and Future

Lecture 6 - Probability and Uncertainty