van Albada and Lagendijk (1985) reported the observation of weak localization of light in a random medium. They used a highly concentrated suspension of polystyrene particles in water as their sample, which allowed for the study of polarization-dependent enhanced backscattering within a small cone ( approximately 0.2° half-angle) at high concentrations. The experiment aimed to measure Anderson localization, a phenomenon where light is localized due to randomness in the medium. The setup involved expanding a 5-mW He-Ne laser beam to reduce its divergence and using a beam splitter to detect the backscattered light. The results showed that the enhancement factors were lower than predicted by theory, and the width of the backscatter cone was consistent with a renormalized multiple-scattering expansion. The study also found that the backscattered light inside the critical cone retained some polarization, while outside it was completely depolarized. The authors discussed the implications of their findings and the need for further theoretical work to explain the quantitative differences between theory and experiment.van Albada and Lagendijk (1985) reported the observation of weak localization of light in a random medium. They used a highly concentrated suspension of polystyrene particles in water as their sample, which allowed for the study of polarization-dependent enhanced backscattering within a small cone ( approximately 0.2° half-angle) at high concentrations. The experiment aimed to measure Anderson localization, a phenomenon where light is localized due to randomness in the medium. The setup involved expanding a 5-mW He-Ne laser beam to reduce its divergence and using a beam splitter to detect the backscattered light. The results showed that the enhancement factors were lower than predicted by theory, and the width of the backscatter cone was consistent with a renormalized multiple-scattering expansion. The study also found that the backscattered light inside the critical cone retained some polarization, while outside it was completely depolarized. The authors discussed the implications of their findings and the need for further theoretical work to explain the quantitative differences between theory and experiment.