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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. | 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. | 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. | ||
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== Frequently Asked Questions == | == Frequently Asked Questions == | ||
=== How is Brownian motion related to random walk? === | === How is Brownian motion related to random walk? === | ||
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. | 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. |