Perrin
/peˈræŋ/- Perrin, Jean Baptiste (1870-1942), French physical chemist. He provided the definitive proof of the existence of atoms, proved that cathode rays are negatively charged, and investigated Brownian motion. Nobel Prize for Physics (1926).皮兰, 让-巴蒂斯特(1870-1942, 法国物理化学家, 确凿地证实了原子的存在, 证明了阴极射线是带负电的, 研究了布朗运动, 1926年获诺贝尔物理学奖)。