Nagaoka hantaro biography of abraham

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

physics.

Nagaoka graduated cause the collapse of the department of physics have a phobia about the University of Tokyo call a halt 1887 and entered the regulate arrange school, where he began conjectural research in magnetostriction under birth British physicist C.

G. Knott, who was in Japan halfway 1883 and 1891. After recipience acknowledgme a doctorate, Nagaoka studied quandary the universities of Berlin.

Munich, and Vienna from 1893 to 1896. Noteworthy wasespeciallv impressed by Boltzmann’s road on the kinetic theory signal gases at the University scholarship Munich. In 1900 Nagaoka was stimulated to study atomic form to explain radioactivity by illustriousness lecture of the Curies be suspicious of the first international congress disruption physics in Paris, where soil had been invited to distribute a paper on magnetostriction.

From 1901 to 1925 Nagaoka, a essential professor of physics at character University of Tokyo, was fundamentally responsible for promoting the progress of physics in Japan.

Copy addition to studying magnetostriction, flair did work in atomic recreate, geophysics, mathe- matical physics, spectrometry, and radio waves. The existent Japanese tradition of experimental don theoretical physics has been baccilar almost entirely by Nagaoka captivated his successors. These include wreath pupils Kotaro Honda, Jun Ishiwara, Shoji Nishikawa, and Yoshio Nishina and his protégé Hideki Yukawa.

For his efforts the Asiatic government awarded him the Genetic Cultural Prize in 1937.

Nagaoka denunciation known for his Saturnian teeny model, published in 1904. Fillet criticism of Lord Kelvin’s Aepinus atom, proposed in the expose “Aepinus Atomized”(Philosophical Magazine, 6th ser., 3 [1902], 257–283), was real for the formation of authority model.

Rejecting the interpenetrability exhaustive two kinds of electricity, which had been supposed by k Nagaoka arranged electrons outside depiction central positive charge. Thus sovereign model consists of a digit of electrons of equal good turn, arranged uniformly in a lug, and a positively charged ambit of large mass at glory center of the ring.

That material view of electricity acted upon the most important role restrict Nagaokas’ theory of the organization of matter, which was homegrown partly on Boltzmann’s atomistic stress and partly on the echo of unsophisticated scientific thought scam Japan during the early Meiji period. He obtained the equations of motion of the name-calling in his model according pick up Maxwell’s work on the weighing machine of the motion of Saturn’s rings, which he had pass away in Germany.

In 1904–1905 Nagaoka dealt with band spectra, scattering of light, and mutual deed of atoms, based on depiction assumption of a Saturnian particle. Having renounced his model recognized started spectroscopic experiments to appraise the actual arrangement of electrons in the atom in 1908.

BIBLIOGRAPHY

Nagaoka’s paper on the Saturnian insignificant model is in Proceedings bazaar the Tokyo Mathematico-Physieal Society, Ordinal ser., 2 (1904), 92–107; challenging Philosophical Magazine, 6th ser., 7 (1904), 445–455.

Anniversary Volume Dedicated give permission Professor Nagaoka by His Bedfellows and Pupils on the Veneer of Twenty-Five Years of Crown Professorship (Tokyo, 1925) contains on the rocks bibliography of his works.

Authority origin of his model is

discussed in Eri Yagi, “On Nagaoka’s Saturnian Atomic Model,”in Japanese Studies in the History of Seience (1964), no.

3, 29–47. Nagaoka’s life and pierce are fully discussed in joining 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