Brownian motion
Videos
Brownian motion is the random motion of particles suspended in a medium. The traditional mathematical formulation of Brownian motion is that of the Wiener process, which is often itself called "Browni
Perrin examined the equilibrium (barometric distribution) of granules (0.6 microns) of gamboge, a viscous substance, under the microscope. The granules move against gravity to regions of lower concentration. The relative change in density observed in 10 microns of suspension is equivalent to that occurring in 6 km of air.
Brownian motion on a sphere
Robert Brown was a Scottish botanist and paleobotanist who made important contributions to botany largely through his pioneering use of the microscope. His contributions include one of the earliest de
Brownian motion
…vibrations, sum up to the caloric component of a fluid's internal energy (the equipartition theorem). This motion is named after the Scottish botanist Robert Brown, who first described the phenomenon in 1827, while looking through a microscope at pollen of the plant Clarkia pulchella immersed in water. In 1900…
Portrait by Henry William Pickersgill
Brown as a young man
Brown in 1855