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The Sellmeier equation is an empirical relationship between refractive index and wavelength for a particular transparent medium. The equation is used to determine the dispersion of light in the medium. It was first proposed in 1872 by Wolfgang Sellmeier and was a development of the work of Augustin Cauchy on Cauchy's equation for modelling ...
Table of Coefficients of Sellmeier equation; Coefficient: for ordinary wave: for extraordinary wave: B 1: 1.43134930: 1.5039759 B 2: ... Carbon-13 NMR: Other NMR data ...
Carbon disulfide: 589.29: 1.628 [1] Benzene: 589.29: 1.501 [1] ... Sellmeier equation; Corrective lens#Ophthalmic material property tables; Optical properties of ...
Wolfgang Sellmeier was a German theoretical physicist who made major contributions to the understanding of the interactions between light and matter. [1] In 1872 he published his seminal work Ueber die durch die Aetherschwingungen erregten Mitschwingungen der Körpertheilchen und deren Rückwirkung auf die ersteren, besonders zur Erklärung der Dispersion und ihrer Anomalien. [2]
A. R. Forouhi and I. Bloomer deduced dispersion equations for the refractive index, n, and extinction coefficient, k, which were published in 1986 [1] and 1988. [2] The 1986 publication relates to amorphous materials, while the 1988 publication relates to crystalline.
Several laws have approximated this relationship to wavelength, notably Cauchy's law and Sellmeier equation. The refractive index of a glass is given for the yellow line known as the d line of helium (then noted n d) or for the green e line of mercury (then noted n e), depending on usage and the two main standards used. [9] [10] [11]
In optics, Cauchy's transmission equation is an empirical relationship between the refractive index and wavelength of light for a particular transparent material. It is named for the mathematician Augustin-Louis Cauchy , who originally defined it in 1830 in his article "The refraction and reflection of light".
2, and coke (impure carbon) to produce P 4. The chemical equation for this process when starting with fluoroapatite, a common phosphate mineral, is: 4 Ca 5 (PO 4) 3 F + 18 SiO 2 + 30 C → 3 P 4 + 30 CO + 18 CaSiO 3 + 2 CaF 2. Of historic interest is the Leblanc process. A key step in this process is the reduction of sodium sulfate with coal: [3]