Hantaro nagaoka model
- •
Hantaro Nagaoka
Japanese physicist (1865–1950)
Hantaro Nagaoka (長岡 半太郎, Nagaoka Hantarō, August 19, 1865 – December 11, 1950) was a Japanese physicist and a pioneer of Japanese physics during the Meiji period.
Life
Nagaoka was born in Nagasaki, Japan on August 19, 1865 and educated at the University of Tokyo.[1]: 633 After graduating with a degree in physics in 1887, Nagaoka worked with a visiting Scottish physicist, Cargill Gilston Knott, on early problems in magnetism, namely magnetostriction in liquid nickel. In 1893, Nagaoka traveled to Europe, where he continued his education at the universities of Berlin, Munich, and Vienna, including courses on Saturn's rings and a course with Ludwig Boltzmann on his Kinetic Theory of Gases, two influences which would be reflected in Nagaoka's later work. Nagaoka also attended, in 1900, the First International Congress of Physicists in Paris, where he heard Marie Curie lecture on radioactivity, an event that aroused Nagaoka's interest in atomic physics. Nagaoka returned to Japan in 1901 and
- •
Nagaoka, Hantaro
(b. Nagasaki, Japan, 15 August 1865; d. Tokyo, Japan, 11 December 1950)
physics.
Nagaoka graduated from the department of physics of the University of Tokyo in 1887 and entered the graduate school, where he began experimental research in magnetostriction under the British physicist C. G. Knott, who was in Japan between 1883 and 1891. After receiving a doctorate, Nagaoka studied at the universities of Berlin. Munich, and Vienna from 1893 to 1896. He wasespeciallv impressed by Boltzmann’s course on the kinetic theory of gases at the University of Munich. In 1900 Nagaoka was stimulated to study atomic structure to explain radioactivity by the lecture of the Curies at the first international congress of physics in Paris, where he had been invited to deliver a paper on magnetostriction.
From 1901 to 1925 Nagaoka, a leading professor of physics at the University of Tokyo, was primarily responsible for promoting the advancement of physics in Japan. In addition to studying magnetostriction, he did work in atomic structure, geophysics, mathe- matical physics, sp
- •
Hantaro Nagaoka
(1865–1950) Japanese physicist
Nagaoka was born in Nagasaki, Japan, and educated at Tokyo University. After graduating in 1887 he worked with a visiting British physicist, C. G. Knott, on magnetism. In 1893 he traveled to Europe, where he continued his education at the universities of Berlin, Munich, and Vienna. He also attended, in 1900, the First International Congress of Physicists in Paris, where he heard Marie Curie lecture on radioactivity, an event that aroused Nagaoka's interest in atomic physics. Nagaoka returned to Japan in 1901 and served as professor of physics at Tokyo University until 1925.
Physicists in 1900 had just begun to consider the structure of the atom. The recent discovery by J. J. Thomson of the negatively charged electron implied that a neutral atom must also contain an opposite positive charge. In 1903 Thomson had suggested that the atom was a sphere of uniform positive electrification, with electrons scattered through it like currants in a bun.
Nagaoka rejected Thomson's model on the ground that opposite charges are impenetrable. He
Copyright ©airtory.pages.dev 2025