Question

define tyndall effect​

Answer 1

What is tyndall effect?

The scattering of light by particles in a colloid solution & suspension.

N0TE: Also known as Willis-Tyndall scattering.

• It is named after physicist John Tyndall.

Answer 2

TYNDALL EFFECT

Explanation :

Tyndall Effect The particles of a colloid are uniformly spread throughout the solution. Due to the relatively smal ler size of particles, as compared to that of a sus pension, the mixture appears to be homogeneous. But actually, if a colloidal solution is observed un der a high power microscope, we can see colloidal particles floating in a solution. This shows that a colloidal solution is a heterogeneous mixture. For example, milk, blood, ink, soap solution, starch solu tion, synthetic detergents etc. Because of the small size of colloidal particles, we cannot see them with naked eyes. But, these particles can easily scatter a beam of visible light passing through them. This scattering of a beam of light is called the Tyndall ef fect and is named after the name of an Irish scientist, John Tyndall who discovered this effect.

Tyndall effect can also be observed when a fine beam of light enters a dark room through a small thole. This happens due to the scattering of light by the particles of dust and smoke in the air. The Tyndall effect can be observed when sunlight passes through the canopy of a dense forest. In the forest, mist con tains tiny droplets of water, which act as particles of colloid dispersed in air .