The dimensional formula for relative refractive index is

[M^{0} L^{1} T^{- 1}]

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[M^{0} L^{0} T^{0}]

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[M^{0} L^{1} T^{1}]

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[M L T^{- 1}]

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Solution

The correct option is A $[M^{0} L^{0} T^{0}]$
Relative refractive index $μ_{r}$ is a ratio of refractive index of medium $μ$ to refractive index of vacuum $μ_{o}$ .
Hence dimensionless $μ_{r} = \frac{μ}{μ_{0}} = [M^{0} L^{0} T^{0}]$

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The dimensional formula for relative refractive index is

The correct option is A [M0L0T0]Relative refractive index μris a ratio of refractive index of medium μ to refractive index of vacuum μo.Hence dimensionless μr=μμ0=[M0L0T0]

The correct option is A $[M^{0} L^{0} T^{0}]$
Relative refractive index $μ_{r}$ is a ratio of refractive index of medium $μ$ to refractive index of vacuum $μ_{o}$ .
Hence dimensionless $μ_{r} = \frac{μ}{μ_{0}} = [M^{0} L^{0} T^{0}]$