Question

Scattering of light by particles in a colloid or particles in a fine suspension is termed as:

• A. Tyndall effect
• B. Refraction
• C. Diffusion
• D. Dispersion

Answer 1

The correct option is A Tyndall effect

Scattering of light by particles in a colloid or particles in a fine suspension is termed as Tyndall effect or Tyndall scattering.
$\bullet$ Colloids and suspensions are made of particles that are big enough to scatter a beam of light.
$\bullet$ When light falls on these mixtures, it collides with their particles and scatters the light beam.
$\bullet$ This makes the path of light visible to us.

On the other hand, solutions do not show tyndall effect as the particles in it are not big enough to scatter a beam of light.