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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Molar refractivity ： ウィキペディア英語版 Molar refractivity Molar refractivity, $A$, is a measure of the total polarizability of a mole of a substance and is dependent on the temperature, the index of refraction, and the pressure. The molar refractivity is defined as :$A\; =\; \backslash frac\; N\_A\; \backslash alpha,$ where $N\_A\; \backslash approx\; 6.022\; \backslash times\; 10^$ is the Avogadro constant and $\backslash alpha$ is the mean polarizability of a molecule. Substituting the molar refractivity into the Lorentz-Lorenz formula gives :$A\; =\; \backslash frac\; \backslash frac$ For a gas, $n^2\; \backslash approx\; 1$, so the molar refractivity can be approximated by :$A\; =\; \backslash frac\; \backslash frac.$ In SI units, $R$ has units of J mol−1 K−1, $T$ has units K, $n$ has no units, and $p$ has units of Pa, so the units of $A$ are m3 mol−1. In terms of density, ρ molecular weight, M it can be shown that: :$A\; =\; \backslash frac\; \backslash frac\; \backslash approx\; \backslash frac\; \backslash frac.$ ==References== * Born, Max, and Wolf, Emil, ''Principles of Optics: Electromagnetic Theory of Propagation, Interference and Diffraction of Light'' (7th ed.), section 2.3.3, Cambridge University Press (1999) ISBN 0-521-64222-1 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Molar refractivity」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.