Abstract Because of the fact that dispersion system had a common phenomenon of light scattering, it was difficult to distinguish colloid from solution. According to this, a high-monochromatic and high-bright red laser was used for the light source, and the control experiment was done with a flashlight of white spotlight. It not only differentiated colloid from solution, but also eliminated the interference generated by absorbing red light from blue solution. Students could make full use of the Tyndall effect to distinguish colloid from solution by analyzing the condition of light scattering. In addition, the Tyndall effect experiment had been improved from three aspects, and eventually showed three improved experiments:doing the aerosol Tyndall effect experiments cleverly, using solid sol and establishing experimental box model to do the Tyndall effect experiments.These improved experiments had more advantages such as simple device, easy operation, obvious phenomenon, energy saving and environmental friendly and so on.
SUN Yan-Jun, HU Zhi-Gang. Research and Improved Experiments of the Tyndall Effect in Liquid Dispersed Systems[J]. Chinese Journal of Chemical Education, 2016, 37(17): 60-65.
