Developing a low-cost experimental apparatus to observe the Tyndall effect using an Arduino and 3D printing

The Tyndall effect describes light scattering by suspended solid particulates with sizes smaller than or comparable to the wavelength of light. This work describes the design and construction of an instructional kit for observing the Tyndall effect. The kit consists of a 3D printed holder that can be combined with low-cost and readily available materials to enable student laboratory experiments.