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cse • paper_1 • mechanicscse-2021-subject-01-008

Special Theory of Relativity — UPSC CSE 2021 Physics PYQ

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An observer detects two explosions, one that occurs near him at a certain time and another that occurs 2\,\mathrm{ms} later 100\,\mathrm{km} away. Another observer finds that the two explosions occur at the same place. What time interval separates the explosions to the second observer?

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