I didn't know about Stephen Hawking mentioning this. But the exercise is very common in special relativity books. I have by far not invented it ;)
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I didn't know about Stephen Hawking mentioning this. But the exercise is very common in special relativity books. I have by far not invented it ;)
hehe sounds interesting. I would like to learn it too :D
The only reference I have is a book in French. I cannot find anything on the web. I may write a post on it next week, if you want. That is a funny topic :)