Clausius-Mossotti and Lorentz-Lorenz Formulas : What is the Difference?
Lorentz-Lorenz (LL) and Clausius-Mossotti (CM) formulas describe properties of discrete media under propagation of an electromagnetic wave (with wavelength λ) in optics and under action of an electromagnetic field in the electrostatic limit (λ → ∝), respectively. By means of the reciprocal substitution of the dielectric permittivity and the refractive index squared these relations are turning over into each other. As it is generally accepted, they are equally suitable for description of properties of the discrete media. This concept is hardly seems to be unreasonable. Really, in both of the cases we wish describe properties of media, when distances b between neighboring atoms are so small that they may be disregarded.
KeywordsDielectric Permittivity Transparent Medium Local Field Correction Photonic Bandgap Structure Macroscopic Field
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