When a very dilute dispersion of small particles or droplets is viewed directly against an illuminating light source it may appear to be transparent In contrast, when the same dispersion is viewed from the side (at a right angle to the illuminating beam), and against a dark background, the dispersion may appear turbid and blue-white in colour The scattered light is due to Tyndall scattering and the optical effect is referred to as the Tyndall effect
the side ways scattering of light passing through a transparent fluid containing suspended material
Tyndall effect is the scattering of radiation by particles that have colloidal dimensions
The scattering of light by colloidally dispersed particles that gives a milky appearance to the mixture
the phenomenon in which light is scattered by very small particles in its path; it makes a beam of light visible; the scattered light is mainly blue