Tuesday, November 14, 2017

General Relativity: curved spacetime and how gravity works

Here is yet another video. This time it is inspired by the question "why things fall?"

I have noticed that most of videos explaining general relativity make a mistake of showing how to visualize curved space and then claiming that this somehow explains how gravity works. Some (better) videos explain that gravitational attraction is mostly due to time slowing down closer to a massive object. But none seem to explain why and how variation in speed of time explains the downward movement. Until today. There you go: