Question:medium

The unit for refractive index is

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Refractive index: \[ \boxed{n=\frac{c}{v}} \] Since it is the ratio of two speeds, it is a dimensionless quantity and has no unit.

Updated On: Jul 15, 2026

m/s
m/s\(^2\)
kg/m\(^3\)
No units

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The Correct Option is D

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