WHAT LAWS OF PHYSICS?
Brownian motion
Visualisation of the behaviour of microscopic particles © Edumédia.
In a fluid, particles move randomly. They shift and collide, causing larger particles to move irregularly. In the 19th century, scientists thought that microparticles were alive, because of their movements, which seem self-directed. It was not until 1827 that Robert Brown successfully described the phenomenon, subsequently called Brownian motion.
