A student when discussing the properties of a medium (except vacuum) writes :
Velocity of light in vacuum = velocity of light in medium. This formula is
Text Solution
Verified by ExpertsThe correct answer is:
D
The formula can be written as 
This formula is dimensionally correct as both the sides are dimensionless. Numerically, this ratio is equal to refractive index which is 
. Hence, the equation is numerically incorrect.
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