Which of the following will show the “Tyndall effect”?- Salt solution
- Milk
- Copper sulphate solution
- Starch solution
Correct Answer: (b) Milk and (d) Starch solution
Explanation: Tyndall effect is shown by colloidal solution. If a beam of light, such as that from a flashlight passes through a colloid, the light is reflected by the colloidal particles and the path of light can therefore be observed. The scattering of light by colloids is known as Tyndall effect.
[Extra information: The Tyndall effect is referred to the phenomenon in which light is scattered by particles in a colloidal solution or in a very fine suspension. It can be seen when the light passes through the colloids or turbid substances causing the light to scatter in multiple directions.
Some instances of observing the Tyndall effect:
- It can be observed when light passes through the canopy in the forest.
- It is observed when light passes through milk.
- It is the reason for the blue color of the sky.
- It can be observed in the fog.]
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