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Physics · Modern

General Relativity

Einstein's 1915 theory that gravity is curved spacetime: the equivalence principle, 'matter tells spacetime how to curve', the 1919 eclipse, Mercury's orbit, gravitational time dilation and GPS, black holes and gravitational waves.

30 min · 6 steps · videoJump to quiz ↓
The secrets of Einstein's unknown equation – with Sean Carroll The Royal Institution · 54 min
Open in YouTube
Step 1 of 6 · Overview30 min read ·
Key idea
Prereqs: Special relativity; Newton's gravity. Next: Black holes; Cosmology. Sources: Einstein (1915–16); Kip Thorne, *Black Holes and Time Warps*; LIGO (2016); Neil Ashby, 'Relativity in the Global Positioning System' (Living Reviews, 2003).
Next: 1. The idea

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