what is the cause of the brownian motion of dust and other small particles?
What is the Brownian Motion? Brownian motion is defined as the continuous and random motion of  the particles suspended in a liquid or in a gas. It is caused by  the collision of these particles with eaâ¦ch other and with the  molecules of the surrounding medium due to their random movement  with varying velocities. It was discovered by Robert Brown in the  year 1927.