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प्रश्न
How is the refractive index of a medium related to the speed of light in it?
लघु उत्तर
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उत्तर
The absolute refractive index of a medium is the speed of light in vacuum divided by its speed in that medium. Thus, for a fixed speed in vacuum, the refractive index is inversely proportional to the speed of light in the medium.
\[n=\frac{c}{v}\]
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