This video is a bit older now (over one year), but I just found about it. And I want to share it here, because it was very well explained, without boring stock videos or background music. It’s just like a teacher would teach you, but with some enthusiasm behind it. I enjoy his videos so far.
- Watch on YouTube: https://youtu.be/Zkv8sW6y3sY
- Watch on Invidious, a more private and indirect way to watch: https://inv.nadeko.net/watch?v=Zkv8sW6y3sY
Video description:
Why is the speed of light the same in all reference frames? Let’s rediscover the thought experiments that led Einstein to his special theory of relativity
Chapters:
00:00 Introduction
01:15 1/3 Detect motion with particles? (Thought experiment)
04:01 Inertia doesn't allow detecting constant velocity motion
06:18 2/3 Detect motion with waves? (Thought experiment)
09:18 Medium doesn't allow detecting constant velocity motion
10:15 Constant velocity motion is RELATIVE!
11:02 3/3 Detect motion with light? (Thought experiment)
13:12 Does light break relativity?
13:46 Michelson & Morley's experiment (oversimplified)
14:20 The logical conclusion - Speed of light is same in all frames
Their video about how curved spacetime causes the effects of gravity is also very well done.