Fundamental ideas and problems of the theory of relativity

The lecture explains core conceptual foundations of relativity, distinguishing the physical relativity problem — whether nature admits preferred states of motion — from an epistemological requirement that concepts must correspond unambiguously to observable facts. It examines classical mechanics’ reliance on inertial frames, rigid bodies, and absolute time, critiques their empirical and logical shortcomings, and traces how special relativity reconciles the relativity principle with Maxwell-Lorentz electrodynamics by abandoning absolute time and defining simultaneity via light propagation. It sketches how these issues motivate the general theory and notes later efforts to base geometry and physical laws on more logically coherent formulations by Levi-Civita, Weyl, and Eddington.