what is mean by tyndall effect?
The phenomenon by which colloidal particles scatter light is called Tyndall effect. If a light is allowed to pass through a true solution, some of the light will absorbed and some will be transmitted. The particles in true solution are not large enough to scatter the light. However if light is passed through a colloid, the light is scatterad by the larger colloidal particles and the beam becomes visible. This effect is called TYNDALL EFFECT.