Question

name the phenomenon involved in above activity?a) diffusion b) sublimation c)Tyndall effect​

Answer 1

The above activity demonstrates TYNDALL EFFECT .

• Activity photo is attached !

• Whenever a beam of light is allowed to $\rm pa{s}s$ through a colloidal solution, the light tends to undergo scattering.

• Now, this scattering of light results in visibility of the beam of light.

• The same phenomenon is observed when sunlight passes through foggy-mist of a forest within the trees. The light becomes visible due to scattering.

• This phenomenon was first demonstrated by JOHN TYNDALL.

• The basic principle for the scattering is that: The wavelength of the light is approximately equal to the dimensions of the particle which enhances the scattering.

• This phenomenon cannot be demonstrated in pure solutions or suspensions.

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