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Learning · Advanced physics
Special & general relativity
Einstein's frameworks — spacetime, time dilation, mass-energy, and curved gravity.
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Summary
Special relativity (1905): time and space depend on motion; light speed is the universal speed limit; E = mc².
General relativity (1915): gravity is curved spacetime — mass tells space how to bend, bent space tells mass how to move.
- GPS needs Einstein's corrections.
- Black holes and gravitational waves confirmed GR.
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