Brownian_Motion

Brownian Motion Brownian Motion In 1827, the English botanist Robert Brown noticed that pollen grains suspended in water jiggled about under the lens of the microscope, following a zigzag path such as the picture on page three. Brown had discovered what is now known as Browian motion or Browian movement. Even more remarkable was the fact that pollen grains that had been stored for a century moved in the same way. The motion appeared to be totally random and at first Brown thought that he had discovered the “primitive molecule”. That is until he observed the same motion in dusty particles of inorganic matter. Many people tried to master the concept of Brownian movement and had to go through some testy times. In 1889, G.L. Gouy found that the "Brownian" movement was more rapid for smaller particles. For example, we do not observe Brownian motion in cars, buildings, or people. In 1900, F.M. Exner undertook the first quantitative studies, measuring how the motion depended on temperature and particle size. And he found that the speed of movement increased with a rise in temperature, but then, it decreased if bigger particles were used in the observation. The first truly reasonable explanation of Brownian movement came in 1877 by a man with the brownian, motion, perrin, einstein, grain, time, theory, particles, movement, paper, observations, mean, horizontal, einstein’s, studies, same, path, one, molecular, known, found, displacement, agitation, way, times, suspended, prove, prize, particle, observation, motions, make, given, following, about,