Summary
Matter causes space-time to be curved!
- Matter moves along “geodesic lines” (shortest paths) in curved space-time.
- “Matter tells space how to curve and space tells matter how to move”. All is geometry!
- No need for forces!
General Relativity essential to understand the universe
- Predicts Black Holes, Big band , … (later)
- Experimentally tested
- Resolves problem - “no action at a distance”
Newton’s laws still work for “everyday problems”
- Einstein’s theory very mathematical and very difficult
The theory is unfinished!
- One of the goals of current physics research: to describe other “forces” (like electrical forces) in a unified way.