Originally posted by Tigron-X
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There is a train moving on a track with a lighting rod attached to its engine. There is 1 observe on the train while it is in motion, there is also 1 observer on the ground alongside the track watching as it passes by. At the precise second the train passes the stationary observer, lighting strikes the rod. It takes a small but measurable time for the flash of lightning to appear to each observer; however, because the train is in motion, it will have moved every so slightly by the time the stationary observer witnesses the strike. Hence, the stationary observer will literally witness the strike occurring at a different place in time and space as the passenger on the train ( he will see if a split second after the passenger, because it has to travel back to where he stands). Both stories will be true, and different. They will not match. I feel like I've butchered this experiment a bit, but it and others like it began to make certain scientists wonder if it is possible for 2 events to occur simultaneously and yet be different to multiple observers. This leads to quantum theory, though I know little more.
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