Scattering of light Rayleigh

Figure 24. The acquisition camera image of the Keck LGS with the segmented mirror "unstacked." The brightening on the left is the Rayleigh scatter of light from the laser. The 36 spots show an elongation increasing with distance from the laser source, which is left of the camera.

K) Ibid.. Tables Relating to Rayleigh Scattering of Light in the Atmosphere, Contract AF 19(122)-239, Sci. Rept. 3. 

Fluctuations in the order parameter are reflected in various physical properties of a liquid crystal material. In this section we will focus on the elastic (Rayleigh) scattering of light by such fluctuations in the isotropic phase of nematic and cholesteric materials near Tc. 

The well-known -dependence of the cross-section is responsible for pronounced Rayleigh scattering of light at the short-wavelength end of the visible spectrum. 

Rayleigh Scattering the scattering of light by particles much smaller than the wavelength of the light, e.g., molecular scattering in the natural atmosphere. 

The study of the scattering of light by colloidal systems has a long history. The Tyndall effect describes the scattering of light by suspended particles. In fact, the first rigorous theory was that of Rayleigh in 1871. 

Peter Debye in 1944 further extended the work of Rayleigh and the fluctuation theory of Smoluchowski and Einstein to include the measurement of the scattering of light by macromolecular solutions for determining molecular size. 

Scattering of light by gaseous air pollutants is negligible compared to the Rayleigh scattering by 02 and N2 because of the very low concentrations of pollutants compared to those of the major components of air. 

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