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 67: An Overview of Language Part 2
Episode 66: An Overview of Language Part 1
Episode 65: Money, Inflation, and Interest Rates
Episode 64: Knowledge Representation
Episode 63: The Nervous System
Episode 62: Organic Chemistry Demystified
Episode 61: Magnetism
Episode 60: Memory Encoding and Recall
Episode 59: Smell
Episode 58: Taste
Episode 57: Electric Current and Circuits
Episode 56: The Gains from Trade
Episode 55: Sex and Gender Part 2
Episode 54: Sex and Gender Part 1
Episode 53: Sound and Music
Episode 52: Applications of Optics
Episode 51: Acids and Bases
Episode 50: Science Myths and Misconceptions
Episode 49: Market Structure
Episode 48: Theory of the Firm
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