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Schwartz, Melvin

(Encyclopedia)Schwartz, Melvin, 1932–2006 American physicist, b. New York City, Ph.D. Columbia, 1958. He was on the faculty at Columbia (1958–66, 1991–2000, emeritus 2000–2006) and Stanford (1966–83). Sch...

Salam, Abdus

(Encyclopedia)Salam, Abdus, 1926–96, Pakistani physicist. After attending Government College at Lahore, he received a Ph.D. from Cambridge (1952). He taught in Lahore for three years before returning to England, ...

Lederman, Leon Max

(Encyclopedia)Lederman, Leon Max lĕdˈərmən [key], 1922–2018, American physicist, Ph.D. Columbia, 1951. He was a professor at Columbia until he became director of the Fermi National Accelerator Laboratory in B...

Gell-Mann, Murray

(Encyclopedia)Gell-Mann, Murray gĕlˈ-män [key], 1929–2019, American theoretical physicist, b. New York City, grad. Yale 1948, Ph.D. Massachusetts Institute of Technology, 1951. He was associated with the Univ....

antiparticle

(Encyclopedia)antiparticle, elementary particle corresponding to an ordinary particle such as the proton, neutron, or electron, but having the opposite electrical charge and magnetic moment. Every elementary partic...

Fermi, Enrico

(Encyclopedia)Fermi, Enrico ĕnrēˈkō fĕrˈmē [key], 1901–54, American physicist, b. Italy. He studied at Pisa, Göttingen, and Leiden, and taught physics at the universities of Florence and Rome. He contribu...

Jackman, Wilbur Samuel

(Encyclopedia)Jackman, Wilbur Samuel, 1855–1907, American educator, b. Mechanicstown, Ohio, grad. Harvard, 1884. Jackman was a leader of the nature study movement in elementary schools. He taught (after 1889) at ...

neutron star

(Encyclopedia)neutron star, extremely small, extremely dense star, with as much as double the sun's mass but only a few miles in radius, in the final stage of stellar evolution. Astronomers Baade and Zwicky predict...

quantum field theory

(Encyclopedia)quantum field theory, study of the quantum mechanical interaction of elementary particles and fields. Quantum field theory applied to the understanding of electromagnetism is called quantum electrodyn...

colloid

(Encyclopedia)colloid kŏlˈoid [key] [Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also...