The phenomena of scattering of light by the colloidal particles is known as Tyndall effect.
this effect can be observed :-
1) when a fine beam of sunlight enters a room containing suspended particles of the dust the path of the beam of light visible this is due to the scattering of light 
2) when sunlight passes through a canopy of dense forest. In the forest,it  contains tiny water droplets which act as a colloidal particles. there tiny water droplets scatter the sunligh