Question 7
MediumOriginal questionA beam of sunlight is clearly visible as it passes through the mist in a forest. This is an example of
Show the answer and explanation
CorrectNot quiteAnswer B
Correct answer: B
Explanation
Mist is a colloid of tiny water droplets in air.
Colloidal particles scatter light sideways, so the path of the beam becomes visible. This is the Tyndall effect; a true solution does not show it.
- Concept
- The Tyndall effect
- Typical timeTypical
- 60 s
- Your timeYours
- —
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