December 1, 2018
When Albert Einstein came up with the ideas for General and Special Relativity plus Space Time he did it sat at his desk. He wasn’t working in a lab with retorts and chemicals. He just sat at his desk and used a thought experiment.
For example when he was working on time and how things could happen simultaneously he thought about a man stood on a railway station. He saw two bolts of lightning simultaneously strike the station platform on each side of the man. Then hr considered a woman passing the man on a rapidly moving train and thought about what the woman would see. In his mind he could see that if the woman passed him at the same time as the lightning bolts stuck she would be moving towards one bolt and away from the other. He realised that for her they would appear to strike a few moments apart. From this he deduced that speed affects what we see. What fro him was simultaneous wasn’t for the woman.