CAMBRIDGE, England â British scientist Stephen Hawking has decoded some of the most puzzling mysteries of the universe but he has left one mystery unsolved: How he has managed to survive so long with such a crippling disease.
Brownian movement. n. 1. (General Physics) random movement of microscopic particles suspended in a fluid, caused by bombardment of the particles by molecules of the fluid. First observed in 1827, it provided strong evidence in support of the kinetic theory of molecules.
This is known as Brownian movement and is due to bombardment of the colloidal particles by molecules of the dispersion medium. Brownian movement is usually observed when particles are below 5Âµ in size. The presence of a charge on colloidal particles gives them electrical properties.