Thought experiments are fascinating. Here are four examples that illuminate certain philosophical, scientific and philosophical ideas
Einstein’s Train and Light Experiment
Einstein imagines sitting on a railway platform watching a steadily moving train carriage pass by. His friend sits in the middle of the train carriage. A light bulb is switched on in the middle of the train carriage as it passes Einstein. The friend sees the light hit both end walls of the carriage simultaneously. But Einstein sees the light hit the rear wall of the carriage before it hits the front wall because the rear wall is moving forward to meet the light, which travels a shorter distance.
But, while teaching at a Pisa , Galileo did a thought experiment that showed all bodies fall independently of their weight. He considered dropping three identical weights simultaneously from the same height – all three weights hit the ground at the same time. Now, he mentally combined two of the weights using a weightless glue.
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