Einstein’s Solution: Curved Space-time
Einstein: “No experiment performed in one place can distinguish a gravitational field from an accelerated reference frame”
“Accelerated” means motion that changes with time, i.e., curved!
Example: Light must bend in a gravitational field just as in an accelerating reference frame
- Figure from last time: Path of light seen by astronaut in an accelerating rocket. Light appears to accelerate toward bottom of rocket just like anything else!