Question

(i) What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain) during Brownian motion.
​(ii) 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?

Answer 1

Explanation:

the erratic random movement of microscopic particles in a fluid, as a result of continuous bombardment from molecules of the surrounding medium.