Answer the following questions.

Define:

a. Tyndall effect

b. Brownian movement.

a. The phenomenon of scattering of a beam of light by the colloids is called Tyndall effect. Tyndall effect is observed when sunlight passes through the canopy of a dense forest.

b. The random zig-zag motion of colloidal particles suspended in a liquid or gas medium is called Brownian movement or Brownian motion. This random motion is caused due to the collision of the colloidal particles with the particles of the medium.

The diagram is shown below: