An introduction to the conceptual and mathematical framework of Einstein's General Theory of Relativity. We begin by considering the key insight of gravity as a geometric phenomenon, and how the curvature of spacetime by matter explains the equality of inertial and gravitational mass. We then discuss the mathematics of general relativity, including geodesics, differential manifolds, covariant derivatives, the metric tensor, Christoffel symbols, the Riemann curvature tensor, the Ricci tensor, and the energy-momentum tensor. The episode concludes with a derivation and explanation of the significance of Einstein's Field Equations. Recommended pre-listening is Episodes 114 and 115: Special Relativity 1 and 2.
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Episode 2: Organic Agriculture Part 1
Episode 122: Respiratory and Circulatory Systems Part 1
Episode 121: The Biology of Pain
Episode 120: Computational Chemistry Part 2
Episode 119: Computational Chemistry Part 1
Episode 118: Cell Signalling
Episode 117: Intracellular Protein Sorting
Episode 116: The Cell Membrane
Episode 115: Special Relativity Part 2
Episode 114: Special Relativity Part 1
Special Episode: Visual Processing in Mice
Episode 113: Visual Processing
Episode 112: Introduction to Microbiology
Episode 111: Plate Tectonics
Episode 110: Weather Part II
Episode 109: Weather Part I
Episode 108: Political Institutions and Sustained Economic Growth
Episode 107: Cultural, Geographic, and Political Explanations of Poverty
Episode 106: Theories of Economic Growth and Development
Special Episode: Mario Livio on Galileo
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