Lecture 7: Einstein's Theory of General Relativity

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In this video we discuss the concepts involved in Einstein's Theory of General Relativity:
(1) The equivalence principle of acceleration and gravity
(2) Motion of free particles (and light) along geodesics
(3) Geometry on curved surfaces & how parallel lines can cross
(4) Einstein's relation between curvature of space time and the density of energy and matter
(5) The cosmological constant
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