General Relativity Lecture 4 - YouTube

https://www.youtube.com/watch?v=YdnLcYNdTzE&t=36m24s&index=4&list=PL9peWTxCcrBLLE89-Pwab3Qc1uoaKEH0e+36m24s

(October 15, 2012) Leonard Susskind moves the course into discussions of gravity and basic gravitational fields. The Fall 2012 quarter of the Modern Physics ...