Isidor Isaac Rabi

Israel Isaac "Isidor" Rabi (Yiddish: איזידאָר יצחק ראַבי, romanized: Izidor Yitzkhok Rabi; July 29, 1898 – January 11, 1988) was an American physicist who received the Nobel Prize in Physics in 1944 "for his resonance method for recording the magnetic properties of atomic nuclei." He was also one of the first scientists in the United States to work on the cavity magnetron, which is used in microwave radar and microwave ovens.

Born into a traditional Polish-Jewish family in Rymanów, Austria-Hungary, Rabi came to the United States as an infant and was raised in New York's Lower East Side. He entered Cornell University as an electrical engineering student in 1916, but soon switched to chemistry. Later, he became interested in physics. He continued his studies at Columbia University, where he was awarded his doctorate for a thesis on the magnetic susceptibility of certain crystals. In 1927, he headed for Europe, where he met and worked with many of the finest physicists of the time.

In 1929, Rabi returned to the United States, where Columbia offered him a faculty position. In collaboration with Gregory Breit, he developed the Breit–Rabi equation and predicted that the Stern–Gerlach experiment could be modified to confirm the properties of the atomic nucleus. His techniques for using nuclear magnetic resonance to discern the magnetic moment and nuclear spin of atoms earned him the Nobel Prize in Physics in 1944. Nuclear magnetic resonance became an important tool for nuclear physics and chemistry, and the subsequent development of magnetic resonance imaging (MRI) from it has also made it important to the field of medicine.