Question

Why is the Tyndall effect shown by colloidal particles? State four instances of observing the Tyndall effect.

Answer 1

Tyndall effect:

• Tyndall effect is the phenomenon of the scattering of light particles.
• Tyndall effect is shown by Colloidal particles because small colloidal particles are invisible to the naked eye, but they are large enough to disperse a light beam.
• Mostly Tyndall effect is shown by colloidal particles because of their small size $(1\mathrm{nm}-1000\mathrm{nm})$ so that they can scatter light through them.
• Also, some fine suspension solutions can show this
• This phenomenon is similar to Rayleigh's scattering.
• The intensity of scattered light is determined by the density of colloidal particles as well as the incident light's frequency.

Instances for observing the Tyndall effect:

• Tyndall effect can be observed when sunlight enters a dark room where the dust particles get scattered.
• It can be seen through the fog when a torch is switched on.
• It is the cause of the sky's blue color.
• When a light goes through the milk, it may be seen.