Eigenchris YouTube Channel
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YouTube channel with long lecture series on tensor calculus, special relativity, and general relativity, building the index notation and differential geometry needed to read Einstein's field equations rather than only describing them qualitatively.
More resources on Special Relativity
Wolfram MathWorld
MathWorld is an online mathematics encyclopedia from Wolfram Research offering detailed, browsable articles on topics across the math spectrum, including algebra, geometry, calculus, and number theory. Each entry includes definitions, theorems, formulas, diagrams, worked examples, and links to further reading.
Introduction to Relativity and Spacetime Physics (MIT 8.033)
A thorough treatment of special relativity with an introduction to the core ideas of general relativity, pitched at sophomores after first-year physics. Detailed prose lecture notes that read as an open textbook teach spacetime diagrams, four-vectors, relativistic dynamics and curved spacetime.
Introduction to Special Relativity (MIT 8.20)
A compact course on Einstein's special relativity: time dilation, length contraction, Lorentz transformations, relativistic kinematics, Doppler shifts and the classic paradoxes. 52 short lecture videos, problem sets and exams with solutions let learners solve standard relativity problems confidently.
Spacetime Physics Companion Website
Edwin Taylor's free download page for Spacetime Physics, second edition, by Taylor and Wheeler: the complete text, individual chapters, the Lorentz transformation supplement, and answers to odd-numbered problems, all released under a Creative Commons license.
Special Relativity
Learn special relativity from Leonard Susskind's lectures! Explore spacetime, Lorentz transformations, and relativistic physics.
Special Relativity
Mermin's short undergraduate treatment derives the kinematics of special relativity from the two postulates using spacetime diagrams and elementary algebra, covering time dilation, length contraction, the twin paradox, and momentum without requiring tensor machinery.