English
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EnglishVoice Age
Middle Aged (35-54)Accents
Indian (General)Transcript
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Einstein knew that if you could understand the properties of light, then he could understand the way the universe really worked. And he did it with a deceptively simple thought experiment. He imagined himself standing on a train platform holding a clock that uses light to tell the time the clock ticks as a single photon of light bounces back and forth between two mirrors on a nearby train, an identical clock ticks at an incidental rate. Einstein then imagine that the train starts to pull away and he realized as he did so he could see the clock on the train start to behave differently when the train is moving as well as seeing the photon bouncing up and down. He also sees it moving forward, the photon is traveling further. And since the speed of light is constant, it means that each tick appears to take longer. For Einstein explanation was simple time was passing slowly on the moving train and the faster the time goes, the slower the time passes.