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CSE · Paper I · Mechanicscse-2024-subject-01-004

Special Theory of Relativity — UPSC Physics Optional CSE 2024 Paper I

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A galaxy in the constellation Ursa Major is receding from the Earth at 15000\text{ km/s}. If one of the characteristic wavelengths of light emitted by the galaxy is 550\text{ nm}, what is the corresponding wavelength measured by astronomers on the Earth?

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