The sun's rays passing through the fog
Tyndall effect on the CN Tower . Toronto Canada
It seems that the flour, suspended in water, has a blue color. This effect is explained by the fact that blue light is scattered by flour particles stronger than red light.
Tyndall effect, Tyndall scattering ( English Tyndall effect ) - the optical effect , the scattering of light when a light beam passes through an optically inhomogeneous medium. Usually observed as a luminous cone ( Tyndall cone ), visible against a dark background.
It is characteristic of solutions of colloidal systems (for example, metal sols , diluted latexes , tobacco smoke ), in which particles and their environment differ in refractive index. The Tyndall effect is the basis of a number of optical methods for determining the size, shape and concentration of colloidal particles and macromolecules .
The Tyndall effect is named for John Tyndall, who discovered it.
See also
- Nephelometry
- Sunny post
- Twilight rays