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Question

What happens when a strong beam of light is passed through a colloidal solution?


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Solution

Colloids

  • Colloids are type of mixtures which contain 1-1000 nm sized particles dispersed in a medium.
  • The particles dispersed are called dispersed phase and the medium in which particles are dispersed is called the dispersion medium.
  • Depending upon the states of dispersed phase and dispersion medium different types of colloids are present like emulsion, sol, aerosol etc.
  • When a beam of light is passed through a colloidal solution, lightly gets scattered by the particles dispersed in the medium, hence the path of light becomes visible. This phenomenon is called Tyndall effect.

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