Brownian movement: The zig-zag motion of particles suspended in a medium is called Brownian movement It was Einstein in the year 1905 for his Ph.D. thesis used the Brownian Motion to prove the existence … The first person to propose a mathematical model for Brownian motion was Thorvald N. Thiele in a paper on the least-squares method that was published in 1880. Brownian motion is also known as pedesis, which comes from the Greek word for "leaping." Brownian diffusion is the characteristic random wiggling motion of small airborne particles in still air, resulting from constant bombardment by surrounding gas molecules. Brownian Movement in chemistry is said to be the random zig-zag motion of a particle that is usually observed under high power ultra-microscope. This was named after Robert Brown (who would have guessed "Brownian theory" was named after someone named "Brown"?). Such irregular motions of pollen grains in water were first observed by the botanist Robert Brown in 1827, and later similar phenomena were found for small smoke particles in air. The yellow particles leave 5 blue trails of random motion and one of them has a red velocity vector. Brownian motion is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving atoms or molecules in the gas or liquid. This is a simulation of the Brownian motion of 5 particles (yellow) that collide with a large set of 800 particles. The mathematical explanation of Brownian motion is a comparatively easy probability calculation, of significance not just in the subjects of physics and chemistry, but also to describe other statistical phenomena. 2.1: Brownian Motion: Evidence for Atoms - Chemistry LibreTexts A Brownian Motion is a continuous zig-zag movement of the particles in the size range of 10-9 to 10-6 m known as colloids, in a dispersion medium called the colloidal sol. The first person to propose a mathematical model for Brownian motion was Thorvald N. Thiele in a paper on the least-squares method that was published in 1880. Even though a particle may be large compared to the size of atoms and molecules in the surrounding medium, it can be moved by the impact with many tiny, fast-moving masses. It is commonly referred to as Brownian movement” . Brownian motion is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the fast-moving atoms or molecules in the gas or liquid. Brownian motion is, according to Wikipedia, the "random motion of particles suspended in a fluid (be that a liquid or a gas) resulting from their collision with the fast-moving atoms or molecules in the gas or liquid." This movement resembles the exact motion of pollen grains in water as explained by Robert Brown, hence, the name Brownian movement. “Brownian motion denotes the random movement exhibited by tiny particles that are suspended in any fluids. This motion is a result of the collisions of the particles with other fast-moving particles in the fluid. Stephanie has a master's degree in Physical Chemistry and teaches college level chemistry and physics. This is the way a liquid or gas molecule moves and is called Brownian motion. “Brownian motion refers to the random movement displayed by small particles that are suspended in fluids. The mathematical explanation of Brownian motion is a comparatively easy probability calculation, of significance not just in the subjects of physics and chemistry, but also to describe other statistical phenomena. Brownian motion is the random movement of particles in a fluid due to their collisions with other atoms or molecules. This random motion of particles happens as a result of particle collisions that are fast-moving and immersed in water. This random movement is commonly known as Brownian Motion.