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(B) The refractive index of a material is inversely proportional to the wavelength of light according to Cauchy's dispersion formula,$\mu \propto \fra

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$\mu_2 > \mu_1 > \mu_3$

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(B) The refractive index of a material is inversely proportional to the wavelength of light according to Cauchy's dispersion formula,$\mu \propto \frac{1}{\lambda}$.The wavelengths of the given colors are in the order: $\lambda_{	ext{yellow}} > \lambda_{	ext{green}} > \lambda_{	ext{blue}}$.Since $\mu$ is inversely proportional to $\lambda$,the refractive indices will follow the order: $\mu_{	ext{yellow}} Given that $\mu_1$ is for green,$\mu_2$ is for blue,and $\mu_3$ is for yellow,we have $\mu_3  \mu_1 > \mu_3$.

The refractive index of a prism is measured using three lines of a mercury vapour lamp. If $\mu_1, \mu_2$ and $\mu_3$ are the measured refractive indices for these green,blue and yellow lines respectively,then

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