Brownian motion


Brownian motion is used to refer to the random motion of microscopic particles in a fluid. The motion is random because the particles collide with the atoms and molecules. The name comes from a botanist, Robert Brown, who observed such motion first while observing the movement of microscopic starch grain particles inside a pollen. This observation later led to the confirmation that any matter is made up of atoms, by Albert Einstein and Jean Perrin.

Frequently Asked Questions[edit]

How is Brownian motion related to random walk?[edit]

Brownian motion is simply an extension of a random walk that is scaled with time. So a random walk is usually considered as a discretization of a Brownian motion.