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Results tagged with spacetime
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user 223965
Within relativity (both special and general), changes of reference frames can change both the notions of space and of time, with one depending on the other as well. As a consequence, it is necessary to treat both concepts in a unified manner. Hence the term spacetime.
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Change of simultaneity with speed and direction
I am a physics enthusiast. I was watching a video by Professor Brian Greene on YouTube. He said that when an alien in a distant galaxy is at rest relative to Earth, he will see the present of earth. …
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