Answer:
The particles in a colloid will scatter light, making the beam visible.
Step-by-step explanation:
When a beam of light is passed through a colloid, the particles present in the colloid scatter the light in all directions. This is called the Tyndall effect, and it makes the beam of light visible as it passes through the colloid. In contrast, when a beam of light is passed through a solution, the particles present in the solution are too small to scatter the light and therefore, the beam of light passes through the solution without any visible scattering. Hence, the Tyndall effect can be used to distinguish between a colloid and a solution.