Astronomy › Section R · Black holes and curved spacetime › Topic R.2
Tests of relativity and time in gravity
A beautiful theory still has to survive measurement. General relativity has passed every test for over a century, from Mercury's orbit and starlight at an eclipse to the clocks inside the GPS satellites that guide your phone.
In this topic
- Putting Einstein to the test
- Mercury's turning orbit
- Worked example: how slow is 43″ per century?
- Bending starlight
- Worked example: the 1.75″ deflection
- Gravity slows time
- Gravitational redshift and delayed signals
- Worked example: relativity and GPS
- A pulsar laboratory
- Common mistakes to avoid
- Key takeaways
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