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  4. The graph which represents the relation between refractive index μ with wavelength λ is

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Q. The graph which represents the relation between refractive index $\mu $ with wavelength $\lambda $ is

NTA AbhyasNTA Abhyas 2022

Solution:

Since, from Cauchy's relation
$\mu =A+\frac{B}{\lambda ^{2}}$
$\Rightarrow \, \mu \propto \frac{1}{\lambda ^{2}}$