Einstein's Gravity Explained: How Curved Spacetime Bends Light | Physics Explained 7.3

In 1919, stars near the eclipsed Sun appeared out of place, and Einstein became world famous. This lesson covers the cracks in Newton's picture (action at a distance, Mercury's orbit), the equivalence principle (two elevators you can't tell apart, and free fall), why an accelerating room bends light, curved spacetime (Newton's tug of war vs Einstein's bending), the eclipse test, Gravity Probe B, and why your phone's GPS needs relativity. Ends with a summary of the chapter. Chapters: 0:00 Intro 1:15 Cracks in Newton's picture 2:06 The equivalence principle 3:27 So gravity must bend light 4:04 Curved spacetime 5:22 The test: starlight near the Sun 6:06 More evidence, even in your pocket 7:09 Common mistakes 7:49 Recap 8:33 Check yourself 9:49 Up next Physics Explained, Chapter 7: Newton's Law of Gravitation (lesson 3 of 3) Adapted from Physics by OpenStax (https://openstax.org/details/books/ph..., licensed under CC BY 4.0 (https://creativecommons.org/licenses/.... The animations and narration are original to Prime Mover. OpenStax is not affiliated with this channel and does not endorse it. Prime Mover: learn it, build it, share it.