MP Board · Class 9 · Science · Is Matter Around Us PureWhat is the Tyndall effect? Why does a true solution not show the Tyndall effect?
Step-by-Step Solution
The phenomenon of scattering of a beam of light by colloidal particles when passed through a medium, making the path of light visible, is called the Tyndall effect. A true solution does not show the Tyndall effect because the solute particles in a true solution are extremely small (less than 1 nanometer or $10^{-9}$ m in diameter). Because of this microscopic particle size, they cannot scatter a beam of visible light passing through the solution, allowing light to pass through without being scattered.
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