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Non-resonant Interactions with Electromagnetic Waves

Chapter

Abstract

An electromagnetic field of light which is not in resonance with energy levels of the electrons of a sample can induce forced oscillations of these electrons, which then re-emit light of the same wavelength as the incident light, but in a different direction. This is called scattering. The intensity of the scattered light depends on the molecular polarisability α of the molecule
$$\alpha = \frac{{n}_{0}{M}_{\mathrm{r}}\partial n} {2\pi {N}_{\mathrm{a}}\partial c}$$
(29.1)
where n 0 is the refractive index of the solvent, M r the molecular mass and N a Avogadro’s number. n ∕ c is the refractive index increment of the sample as function of the weight concentration (g∕ml), conveniently measured with a differential refractometer that can determine even small differences in refractive index with the required precision (see Fig. 29.1).

Keywords

Molecular Mass Virial Coefficient Molecular Polarisability Static Light Scattering Differential Refractometer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.BiochemistryRoss University School of MedicineRoseauDominica

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