The Tyndall effect is due to the fact that colloidal particles____ light in all directions in space.

Options

A. reflect
B. refract
C. scatter
D. diffract

Answer

C

Explanation

Tyndall effect is due to the scattering of light by the colloidal particles. This scattering of light illuminates the path of beam in the colloidal dispersion. Tyndall effect can be observed during the projection of picture in the cinema hall due to scattering of light by dust and smoke particles present there. It is also noticed due to scattering of light by dust particles on account of weak or no interaction between the two phase. When a beam of sunlight enters a dard room through a slit. Mist pierced by headlight at night also displays the same effect.
True solution do not exhibit Tyndall effect because the paricles in them are too small in size and do not case any scattering.