Question

What do u mean by brownian motion

Answer 1

The random motion of particles suspended in a fluid (liquid or gas) results from their bombardment by the fast-moving atoms or molecules of the fluid (liquid or gas). This haphazard motion of the particles is known as Brownian motion .
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Answer 2

THE BROWNIAN MOTION MEANS the erratic random movement of microscopic particles in a fluid,as a result of continues bombardment from molecules of the surrounding medium.