Perrin (Jean Perrin)

Jean Perrin was a French physicist who confirmed the existence of atoms through experiments in the early 20th century. By studying particles suspended in liquids—a phenomenon called Brownian motion—he provided strong evidence that matter is made up of discrete atoms and molecules, supporting the atomic theory. Perrin's work helped resolve debates about whether atoms were real or just theoretical, and his efforts earned him the Nobel Prize in Physics in 1926. His research laid important groundwork for modern chemistry and physics by solidifying the concept that matter has an atomic structure.