The Cauchy's dispersion formula is:

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Question

(A) Cauchy's dispersion formula describes the relationship between the refractive index $n$ of a transparent medium and the wavelength $\lambda$ of li

Vedclass · Accepted Answer

$n = A + B\lambda^{-2} + C\lambda^{-4}$

Vedclass · Answer

(A) Cauchy's dispersion formula describes the relationship between the refractive index $n$ of a transparent medium and the wavelength $\lambda$ of light passing through it.It is empirically given by the expression: $n(\lambda) = A + \frac{B}{\lambda^2} + \frac{C}{\lambda^4} + \dots$Where $A$,$B$,and $C$ are constants specific to the material.Thus,the correct formula is $n = A + B\lambda^{-2} + C\lambda^{-4}$.

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