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cse • paper_1 • waves_oscillationscse-2023-subject-02-006

Refraction of light — UPSC CSE 2023 Physics PYQ

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Write conditions for working of a step-index optical fiber. In a step-index fiber, the core and cladding materials have refractive indices 1\cdot50 and 1\cdot43, respectively. Find the following : (i) Critical propagation angle (ii) Acceptance angle (iii) Total time delay in 1\text{ km} length of the fiber (iv) Total dispersion in 50\text{ km} length of the fiber

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