Brownian motion

Brownian motion is the random movement of particles suspended in a fluid. It is caused by random bombardment by molecules of the fluid.

Mathematically, a Brownian motion process is such that if we know a particle's position is p at time 0, then the particle's position at subsequent time t is a normally distributed random variable with a mean of p and a variance of t. Brownian motion is a kind of [stochastic process]?.

See also diffusion, and osmosis.

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