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The Tyndall effect refers to the:
AScattering of light by colloidal particles
BReflection from a mirror across all cases
CTotal internal reflection
DRefraction through a prism
Answer & Solution
Correct answer: A. Scattering of light by colloidal particles
1. A colloidal solution has particles bigger than molecules but small enough to stay suspended.
2. When light passes through such a colloid, the particles scatter it.
3. The path of the light becomes visible as a bright streak.
4. This visible streak is called the Tyndall effect.
5. Examples include sunlight through forest canopy and a torch beam in misty air.
_Source: NCERT Class 10 Science Ch 11 'Human Eye and the Colourful World'_
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