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Relació de Gladstone-Dale

La relació de Gladstone-Dale és una llei física empírica que lliga l'índex de refracció n d'un gas amb la seva densitat. Estipula que n-1 és proporcional a la densitat ρ :

on K és una constant[1]

Aplicacions

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Gas perfecte

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en l'aproximació d'un gas perfecte, l'índex de refracció està lligat a la temperatura T i a la pressió P per

,

on K' és una constant. Sota petites variacions, es dedueix

Bibliografia

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  • Gladstone, J. H. and Dale, T. P. (1864): Researches on the refraction, dispersion and sensitiveness of liquids. Phil. Trans. Royal Soc. London 153, 317–343.
  • Merzkirch, W. (1987) Flow Visualization, 2nd Edition, Academic Press, ISBN 978-0-12-491351-6
  • Jaffe, H. W. (1988): Crystal Chemistry and Refractivity. Cambridge University Press, Cambridge
  • Mandarino, J. A. (2007): "The Gladstone-Dale compatibility of minerals and its use in selecting mineral species for further study." Can. Mineral. 45, 1307–24
  • Eggleton, R. A. (1991): "Gladstone-Dale constants for the major elements in silicates: Coordination number, polarizability and the Lorentz-Lorenz relation". Canadian Mineralogist, 29, 525–32

Referències

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  1. Tamer Becherrawy «Optique géométrique». De Boeck Université, 2006.(francès)
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Relació de Gladstone-Dale
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