Question

dimensional formula for relative refractive index

Answer 1

Refractive Index is defined as the relative speed at which light moves through a material with respect to its speed in vacuum. As both the values belong to same quantity (speed), units get nullified. So Refractive Index is dimensionless quantity. Dimensional Formula of Refractive Index = M^0L^0T^0.

Answer 2

M^0L^0T^0

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