Tyndall Effect
The Tyndall effect is the scattering of a beam of light by colloidal particles, making the path of light visible.
Practice This ConceptMain explanation
Teacher explanation
Colloidal particles are large enough to scatter light, so a light beam passing through a colloid can be seen from the side. True solutions usually do not show this effect because their particles are too small to scatter light noticeably.
Example
A beam of light becomes visible in fog or in a dusty room because tiny particles scatter light.
Simple analogy
Tyndall tells: tiny colloid particles turn the light path visible.
Common confusion
Students sometimes write that any transparent mixture shows Tyndall effect. A true salt solution is transparent but does not show a visible light path.
Exam tip
When answering, mention both cause and use: scattering by colloidal particles helps distinguish colloids from true solutions.
Study the tyndall effect diagram carefully
Use the labelled diagram to keep tyndall effect clear in short answers and revision.
What this diagram makes clear
This diagram keeps the labels and direction of tyndall effect in the right order.
Where this helps in exams
Use this for labelled diagram work and short exam answers on tyndall effect.
Revision cue
Revise tyndall effect through the labels before writing the answer.
Answer writing and exam use
1-mark use
Write the exact meaning of tyndall effect in one clean line.
2-mark use
Define tyndall effect and add one example or condition.
3-mark use
Explain tyndall effect, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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