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cse • paper_1 • waves_oscillationscse-1999-subject-02-008

Rayleigh criterion — UPSC CSE 1999 Physics PYQ

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Give Rayleigh's criterion for resolution. Why telescopes with larger objectives are better? The objective of the telescope at St. Palomer has a diameter of 5.08 m. What is the least distance on Moon which could be resolved by it? (Given distance of moon from the Earth = 3,84,000 km and \lambda = 5890\text{ \AA}).

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