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Tyndall Effect

A colloid scatters a beam of light passing through it. It means that a beam of light passing through such a colloid is visible. If a beam of light passes through a colloid kept in a dark room the path of light can be seen due to the scattering of light by colloidal particles. The same effect can be generally observed when a beam of light passes through air containing dust. This scattering of light by colloidal particles is known as Tyndall Effect. This effect is not shown in true solutions.

 


In liquids the tyndall effect can be easily seen by using a laser pointer. If you dilute milk to where it is almost clear, or if you have any type of sol, such as colloidal silver, then the beam of the laser can be easily seen as it travels through the liquid.


 




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