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Matter in Our Surroundings
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07/11/2021 4:53 pm
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(a) What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain) during Brownian motion.
(b) In a beam of sunlight entering a room, we can sometimes see dust particles moving in a haphazard way in the air. Why do these dust particles move?
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07/11/2021 4:58 pm
(a) figure.png
The zig-zag movement of the small particles suspended in a liquid or a gas is called Brownian movement.
(b) These dust particles move in a haphazard way because they are constantly hit by the fast moving particles of air.