Milk will show the Tyndall effect
Tyndall effect: The Tyndall effect is the scattering of light by colloidal particles dispersed in a transparent medium. When a beam of light passes through a colloidal solution or suspension, the light is scattered by the particles in the mixture, making the beam visible. This effect is not observed in true solutions, where the solute particles are too small to scatter light effectively. The Tyndall effect is commonly observed in colloidal solutions such as milk, starch solutions, and fog, where the dispersed particles are large enough to scatter light.
