Relativity is the idea that time and space behave differently depending on your perspective. One interesting consequence is that velocities do not add. They combine according to a specific formula, which is extremely fascinating, and the subject of this video.
Chapters:
0:00 Intro
1:27 When velocities do add
4:52 Derivation
8:53 Nice features of the formula
12:01 Tachyons
14:41 Outro
#math #science #physics #relativity
