Tyndall Effect:
It is the phenomenon of light scattering by colloidal particles due to which the path of light through colloidal dispersion becomes visible.
It is not shown by true solutions due to smaller particle size.
Examples of Tyndall Effect:
1) The scattering of automobile headlight by fog and mist.
2) In movie theater, the light coming out from the projector appears bright because the dust particles scatter light.