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The absolute refractive index of a medium is the ratio of:
Answer & Solution
Correct answer: C.
1. Absolute refractive index n = c / v.
2. c is the speed of light in vacuum.
3. v is the speed of light in the medium.
_Source: NCERT Class 10 Science, Ch 9 "Light Reflection and Refraction", §9.3.1_
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