Nagaoka , Hantaro
(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 proposed an alternative model in which a positively charged center is surrounded by a number of revolving electrons, in the manner of Saturn and its rings. Nagaoka's model was, in fact, unstable and it was left to Ernest Rutherford and Niels Bohr, a decade later, to present a more viable atomic model.

Scientists. . 2011.

Look at other dictionaries:

  • Nagaoka Hantarō — Bild von Nagaoka im Science Museum Tokyo Nagaoka Hantarō (jap. 長岡 半太郎; * 15. August 1865 in Ōmura (Nagasaki); † 11. Dezember 1950 in Tokio) war ein japanischer Physiker. Er studierte zunächst an der …   Deutsch Wikipedia

  • Nagaoka (Begriffsklärung) — Nagaoka steht für: Nagaoka, eine Stadt in der japanischen Präfektur Niigata Nagaoka gun (Kōchi), einen Landkreis in der japanischen Präfektur Kōchi Nagaoka (Echigo), ein feudales Lehen (Han) in der japanischen Provinz Echigo Nagaoka (Yamashiro),… …   Deutsch Wikipedia

  • Hantaro Nagaoka — Bild von Nagaoka im Science Museum Tokyo Nagaoka Hantarō (jap. 長岡 半太郎; * 15. August 1865 in Nagasaki; † 11. Dezember 1950 in Tokio) war ein japanischer Physiker. Er studierte unter anderem in Deutschland und in …   Deutsch Wikipedia

  • Hantarō Nagaoka — Bild von Nagaoka im Science Museum Tokyo Nagaoka Hantarō (jap. 長岡 半太郎; * 15. August 1865 in Nagasaki; † 11. Dezember 1950 in Tokio) war ein japanischer Physiker. Er studierte unter anderem in Deutschland und in …   Deutsch Wikipedia

  • Hantaro Nagaoka — Nihongo|Nagaoka Hantaro|長岡 半太郎|Nagaoka Hantarō|August 15 1865 ndash; December 11 1950 was a Japanese physicist and a pioneer of Japanese physics in the early Meiji period. Nagaoka was born in Omura, Nagasaki Prefecture. After receiving his… …   Wikipedia

  • Nagaoka — may refer to: Places Nagaoka, Niigata, Japan Nagaoka kyō, the capital of Japan from 784 to 794 Nagaokakyō, Kyoto, Japan, a city at the location of Nagaoka kyō Izunagaoka, Shizuoka, Japan, a former town in Izu Peninsula. People Hantaro Nagaoka (長岡 …   Wikipedia

  • Nagaoka (crater) — Coordinates 19°24′N 154°00′E / 19.4°N 154.0°E / …   Wikipedia

  • Hantaro Nagaoka — Hantarō Nagaoka (長岡半太郎) (15 de agosto de 1865 11 de diciembre de 1950) fue un físico japonés. Estudió en Alemania y Austria entre 1893 y 1896. En 1904 desarrolló un temprano, e incorrecto, modelo planetario del átomo (teoría saturniana) que… …   Enciclopedia Universal

  • Hantarō Nagaoka — Placa de Hantarō Nagaoka en Tokio. Hantarō Nagaoka (長岡半太郎, Hantarō Nagaoka …   Wikipedia Español

  • Atomic orbital — The shapes of the first five atomic orbitals: 1s, 2s, 2px, 2py, and 2pz. The colors show the wave function phase. These are graphs of ψ(x,y,z) functions which depend on the coordinates of one electron. To see the elongated shape of ψ(x,y,z)2… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”