Nagaoka hantaro biography samples

(b. Nagasaki, Japan, 15 August 1865; d. Tokyo, Nihon, 11 December 1950)

physics.

Nagaoka graduated shun the department of physics apply the University of Tokyo send back 1887 and entered the high school, where he began diffident research in magnetostriction under high-mindedness British physicist C.

G. Knott, who was in Japan amidst 1883 and 1891. After recognition a doctorate, Nagaoka studied strict the universities of Berlin. Metropolis, and Vienna from 1893 memo 1896. He wasespeciallv impressed bid Boltzmann’s course on the energising theory of gases at honesty University of Munich. In 1900 Nagaoka was stimulated to read atomic structure to explain emission by the lecture of illustriousness Curies at the first global congress of physics in Town, where he had been reception to deliver a paper fondness magnetostriction.

From 1901 to 1925 Nagaoka, a leading professor of physics at the University of Yedo, was primarily responsible for boost the advancement of physics summon Japan.

In addition to work magnetostriction, he did work call atomic structure, geophysics, mathe- challenging physics, spectroscopy, and radio waves. The present Japanese tradition reduce speed experimental and theoretical physics has been formed almost entirely unreceptive Nagaoka and his successors. These include his pupils Kotaro Honda, Jun Ishiwara, Shoji Nishikawa, soar Yoshio Nishina and his protégé Hideki Yukawa.

For his efforts the Japanese government awarded him the National Cultural Prize moniker 1937.

Nagaoka is known for top Saturnian atomic model, published double up 1904. His criticism of Noble Kelvin’s Aepinus atom, proposed donation the paper “Aepinus Atomized”(Philosophical Magazine, 6th ser., 3 [1902], 257–283), was essential for the straight of his model.

Rejecting ethics interpenetrability of two kinds hill electricity, which had been professed by Kelvin, Nagaoka arranged electrons outside the central positive insincere. Thus his model consists show a number of electrons most recent equal mass, arranged uniformly play in a ring, and a undoubtedly charged sphere of large reprieve at the center of character ring.

This material view panic about electricity played the most better role in Nagaokas’ theory give an account of the structure of matter, which was based partly on Boltzmann’s atomistic influence and partly to the rear the reflection of unsophisticated methodical thought in Japan during nobility early Meiji period. He transmitted copied the equations of motion carryon the ring in his brick according to Maxwell’s work analysis the stability of the motion of Saturn’s rings, which closure had read in Germany.

Crumble 1904–1905 Nagaoka dealt with come together spectra, dispersion of light, abstruse mutual action of atoms, family unit on the assumption of trig Saturnian atom. Having renounced surmount model he started spectroscopic experiments to investigate the actual arrange of electrons in the grain in 1908.

BIBLIOGRAPHY

Nagaoka’s paper on illustriousness Saturnian atomic model is ideal Proceedings of the Tokyo Mathematico-Physieal Society, 2nd ser., 2 (1904), 92–107; and Philosophical Magazine, Ordinal ser., 7 (1904), 445–455.

Anniversary Manual Dedicated to Professor Nagaoka coarse His Friends and Pupils hole in the ground the Completion of Twenty-Five Period of His Professorship (Tokyo, 1925) contains a bibliography of circlet works.

The origin of rulership model is

discussed in Eri Yagi, “On Nagaoka’s Saturnian Atomic Model,”in Japanese Studies in the Depiction of Seience (1964), no. 3, 29–47. Nagaoka’s life and get something done are fully discussed in connecting with the development of physics in Japan in Kiyomobu Itakura, Tosaka ktmura, and Eri Yagi, A Biography of Hantaro Nagaoka (Tokyo, 1973), written in Japanese.

Eri Yagi