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All lecture recordings are available at: https://mediaspace.illinois.edu/channel/Physics+225+Fall+2020/185164583.
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Discussion Units

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Unit Topic Discussion Answers Lectures Videos
1 (Aug 23-29) Special Relativity: Do You c What I c? Solutions 1 Lecture 1 Video 1
2 (Aug 30-Sept 5) The Lorentz Transformation Solutions 2 Lecture 2 Video 2
3 (Sept 6-12) The Interval, Causality, and Proper Time Solutions 3 Lecture 3 Video 3
4 (Sept 13-19) 4-vectors, Tilted Axes, and the Expanding Universe Solutions 4 Lecture 4 Video 4
5 (Sept 20-26) E = mc2 Solutions 5 Lecture 5 Video 5
6 (Sept 27-Oct 3) Conservation, Conversion, and Nuclear Power Solutions 6 Lecture 6 Video 6
7 (Oct 4-10) The 4-vectors of dynamics Solutions 7 Lecture 7 Video 7
8 (Oct 11-17) Differential Calculus in 3D Solutions 8 no lecture due to in-class midterm N/A
9 (Oct 18-24) Vector Fields and Curvilinear Coordinates Solutions 9 Lecture 9 Video 9
10 (Oct 25-31) The Line Element and Grad, Div, Curl Solutions 10 Lecture 10 Video 10
11 (Nov 1-7) Multi-dimensional Integration I Solutions 11 no lecture due to university holiday N/A
12 (Nov 8-14) Multi-dimensional Integration II and Maxwell's Equations Solutions 12 Lecture 11 Video 11
13 (Nov 15-21) The Zen of i Solutions 13 Lecture 12 Video 12
14 (Nov 29-Dec 5) Pitfalls & Mastery Solutions 14 Lecture 13 Video 13
15 (Dec 6-12) Course summary / finals preparation no disc. section Lecture 14 Video 14

Formula & Summary Sheets