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प्रश्न
Define refractive index of a medium in terms of speed of light.
व्याख्या
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उत्तर
The absolute refractive index (n) of a medium is defined as the ratio of the speed of light in vacuum (c) to the speed of light in that medium (v).
n = `c/v`
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2025-2026 (March) 55/4/1
