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Edit: Due to popular demand FatTony Search servers are down for the time being. but has gone open source just in time (Yes that’s how it works 😡) . You may now get responses from other users. Servers will be back up some time later.
Given that the speed of light is the upper limit for changes to propagate through the universe; if you had a four light-year long indestructible rod and you move one end of the rod how long until the other end moves?
I’m not an expert, but I guess it would depend on the speed of sound in the rod.
Yes - https://www.youtube.com/watch?v=DqhXsEgLMJ0 is a nice explanation.
So about 6 terayears (1.9E+20 seconds) if it’s made from the same steel.
This crashes the simulation.
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That’s distance, not time.
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Somewhat related: let’s say you’re moving at 80% the speed of light away from earth. Then you turn on a flashlight and point it away from earth.