Question

Name and explain the phenomenon of light due to which the path of a beam of light becomes visible when it enters a smoke filled room through a small hole. Also state the dependence of colour of the light we receive on the size of the particle of the medium through which the beam of light passes.

A spoonful of sugar is added to a beaker containing 500 ml of water and stirred for a while. State any two observations that you will make.

Account for your observations.

Distinguish among true solution, suspension and colloid in a tabular form under the following heads: