<i>Molecular Scattering of Light</i>

Fabelinskiǐ, I. L.; Levine, Howard B.

doi:10.1063/1.3035639

Cited by 215 publications

(112 citation statements)

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“…where A is the Helmholtz free energy [36]. The change in Helmholtz free energy associated with the concentration change at constant temperature and volume is given by,…”

Section: Appendixmentioning

confidence: 99%

Scattering by pure seawater: Effect of salinity

2009

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A theoretical model was developed estimating the scattering by seawater that are due to concentration fluctuation. Combining with the model proposed for density fluctuation (Optics Express, 17, 1671, 2009), we evaluated the overall effect of sea salts on the scattering. The variation of seawater scattering with the salinity is a combination of two factors: decreasing contribution due to density fluctuation and increasing contribution due to concentration fluctuation, with the latter effect dominating. The trend is, however, slightly non-linear and the linear adjustment of scattering with salinity that is frequently used would lead to an underestimate by an average of 2%. The results estimated at S = 38.4 per thousand agree with the measurements by Morel (Cahiers Oceanographiques, 20, 157, 1968) with an average difference of 1%, well within his experimental error of 2%. The spectral signature also varies with salinity, with the power-law slope increasing from -4.286 to -4.306 for salinity from 0 to 40 per thousand.

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“…where A is the Helmholtz free energy [36]. The change in Helmholtz free energy associated with the concentration change at constant temperature and volume is given by,…”

Section: Appendixmentioning

confidence: 99%

Scattering by pure seawater: Effect of salinity

2009

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“…The density fluctuations lead to a fluctuating dielectric constant and scattering of light. More precisely, the scattering cross section is proportional to the Fourier transform of the density-density correlation function [34]. The Brillouin side peaks are more pronounced at higher pressures, while their magnitude depends on how strong the density fluctuations are damped.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous Rayleigh–Brillouin scattering of ultraviolet light in nitrogen, dry air, and moist air

et al. 2010

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Atmospheric lidar techniques for the measurement of wind, temperature, and optical properties of aerosols rely on the exact knowledge of the spectral line shape of the scattered laser light on molecules. We report on spontaneous Rayleigh-Brillouin scattering measurements in the ultraviolet at a scattering angle of 90 degrees on N(2) and on dry and moist air. The measured line shapes are compared to the Tenti S6 model, which is shown to describe the scattering line shapes in air at atmospheric pressures with small but significant deviations. We demonstrate that the line profiles of N(2) and air under equal pressure and temperature conditions differ significantly, and that this difference can be described by the S6 model. Moreover, we show that even a high water vapor content in air up to a volume fraction of 3.6vol.% has no influence on the line shape of the scattered light. The results are of relevance for the future spaceborne lidars on ADM-Aeolus (Atmospheric Dynamics Mission) and EarthCARE (Earth Clouds, Aerosols, and Radiation Explorer).

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“…diffus6e[8],[9],[10] n'est importante qu'au voisinage de la reflexion r6guli6re. L'incidence utilis6e est proche de la normale.…”

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Diffusion de la lumière par les ondes de surface sur CO2 près du point critique mesure de la tension superficielle

Meunier

1969

J. Phys. France

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L'analyse spectrale à haute résolution de la lumière diffusée par l'interface liquide-gaz de l'anhydride carbonique permet la mesure de la tension superficielle α à l'interface ; de l'écart de masse spécifique entre phases et de la viscosité. La tension superficielle a été mesurée dans le domaine de température 0,034 ≤ Tc — T ≤ 31 °C. Les résultats sont compatibles avec la relation α = α 0 (1— T/Tc)μ avec μ = 1,253 ± 0,010 et α0 = 17,9 ± 1,2 dynes/cm D'après les résultats expérimentaux, on peut conclure qu'il n'existe aucune anomalie de la viscosité dépassant 15 % jusqu'à 0,034 °C du point critique

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Molecular Scattering of Light

Cited by 215 publications

References 0 publications

Scattering by pure seawater: Effect of salinity

Scattering by pure seawater: Effect of salinity

Spontaneous Rayleigh–Brillouin scattering of ultraviolet light in nitrogen, dry air, and moist air

Diffusion de la lumière par les ondes de surface sur CO2 près du point critique mesure de la tension superficielle

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