跟居里夫人搞到最后儿子女儿结婚了
保羅·朗之萬（法语：Paul Langevin，1872年1月23日－1946年12月19日），法國重要的物理學家，主要貢獻有朗之萬動力學及朗之萬方程。他是反法西斯知識分子警覺委員會的創始人之一，該委員會是一個尾隨1934年2月6日極右暴亂成立的反法西斯組織。他曾於1944年至1946年任法國人權聯盟主席（當時他剛加入了法國共產黨）。
他出生於巴黎，曾就讀於巴黎市立高等工業物理化學學校及法國高等師範學院。後來他到了劍橋大學，並在約瑟夫·湯姆生的指導下於卡文迪許實驗室學習。朗之萬回到了巴黎大學並於1902年在皮埃爾·居里的指導下取得博士學位。於1904年成為法蘭西學院的物理學教授。1926年他當上了曾就讀的巴黎市立高等工業物理化學學校主任。於1934年他被選入了法國科學院。
朗之萬以他的順磁性及反磁性的研究而聞名，他想出了用現代的原子中的電子電荷去解釋這些現象。他最著名的研究是使用皮埃爾·居里的壓電效應的紫外線應用。第一次世界大戰期間，他開始了用聲波去探測潛艇並以其回音確定其位置的研究。但當他的裝置能運作時大戰已經完了。在他的事業生涯中，他在法國做了很多傳播相對論的工作。
他在1911年大概跟居里夫人間有了點風流韻事。他以直言不諱反對納粹主義著稱，當納粹德國佔領法國時他就被維希政府革職。後來他於1944年恢復原職。他於1946年逝世，在巴黎解放2年之后。
Paul Langevin (January 23, 1872 – December 19, 1946) was a prominent French physicist who developed Langevin dynamics and the Langevin equation. He was one of the founders of the Comité de vigilance des intellectuels antifascistes, an antifascist organization created in the wake of the February 6, 1934 far right riots. He was also president of the Human Rights League (LDH) from 1944 to 1946 — he had just recently joined the French Communist Party. Paul Langevin was buried at the Panthéon.
He was born in Paris, and studied at the École de Physique et Chimie and the École Normale Supérieure. He then went to Cambridge University and studied in the Cavendish Laboratory under Sir Joseph John Thomson. Langevin returned to the Sorbonne and obtained his Ph.D. from Pierre Curie in 1902. In 1904 he became professor of physics at the Collège de France. In 1926 he became director of the École de Physique et Chimie, where he had been educated. He was elected, in 1934, to the Académie des sciences.
Langevin is noted for his work on paramagnetism and diamagnetism, and devised the modern interpretation of this phenomenon in terms of electric charges of electrons within atoms. His most famous work was in the use of ultrasound using Pierre Curie's piezoelectric effect. During World War I, he began working on the use of these sounds to detect submarines through echo location. However the war was over by the time he had it operational. During his career, Paul Langevin also did much to spread the theory of relativity in France.
In 1910 he supposedly had an affair with Marie Curie[citation needed] — today, their respective granddaughter and grandson are married to one another: Hélène Langevin-Joliot and Michel Langevin. He was also noted for being an outspoken opponent of Nazism, and was removed from his post by the Vichy government following the occupation of the country by Nazi Germany. He was later restored to his position in 1944. He died in Paris in 1946, two years after living to see the Liberation of Paris.
