Question

The scattering of light by colloidal particle is called :

• A. Tyndall effect
• B. Electrophoresis
• C. Dialysis
• D. Brownian movement

Answer 1

Answer:

A. Tyndall effect

• The scattering of light by colloidal particles is called the Tyndall effect (or Tyndall scattering).

• When a beam of light passes through a colloidal solution, the colloidal particles are large enough to scatter the light waves in different directions.

• Because of this scattering, the path of the light beam becomes clearly visible when viewed from the side.

• Common Examples:

  1.Sunlight filtering through a canopy of a dense forest (crepuscular rays).

  2.Light passing through smoky air or a dusty room.

  3.The blue color of the sky (though molecular scattering like Rayleigh scattering applies to gases, the principle of light scattering is similar).