Answer:The correct answer is option:'the scattering of light by particles in a mixture'.
Step-by-step explanation:
Tyndall effect is defined as scattering of the light by the particles present in the mixture. A beam of the light passing through these mixture are visible to the human eyes. Generally colloidal mixture displays this type of effect. The name of his effect is named after the physicist named John Tyndall.
Hence, the correct answer is option:'the scattering of light by particles in a mixture'.