Question:
Define absolute refractive index of an optical medium.
Define absolute refractive index of an optical medium.
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Absolute refractive index = Speed in vacuum ÷ Speed in medium.
Updated On: Feb 26, 2026
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Solution and Explanation
The absolute refractive index of a medium is defined as the ratio of the speed of light in vacuum to the speed of light in that medium.
\[
n = \frac{c}{v}
\]
Where,
$c$ = speed of light in vacuum
$v$ = speed of light in the medium
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