Hartmann dispersion formula

Hartmann dispersion formula

[′härt·män di′sper·zhən ‚fȯr·myə·lə]
(optics)
A semiempirical formula relating the index of refraction n and wavelengths λ; n = n0+ a /(λ - λ0), where n0, a, and λ0 are empirical constants. Also known as Cornu-Hartmann formula.
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