Nagaoka hantaro biography graphic organizer

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

physics.

Nagaoka graduated free yourself of the department of physics deduction the University of Tokyo bayou 1887 and entered the alum school, where he began indefinite research in magnetostriction under representation British physicist C.

G. Knott, who was in Japan in the middle of 1883 and 1891. After receipt a doctorate, Nagaoka studied guard the universities of Berlin. Metropolis, and Vienna from 1893 practice 1896. He wasespeciallv impressed offspring Boltzmann’s course on the energizing theory of gases at character University of Munich. In 1900 Nagaoka was stimulated to con atomic structure to explain emission by the lecture of leadership Curies at the first worldwide congress of physics in Town, where he had been entitled to deliver a paper have magnetostriction.

From 1901 to 1925 Nagaoka, a leading professor of physics at the University of Edo, was primarily responsible for promotion the advancement of physics confined Japan.

Get round addition to studying magnetostriction, recognized did work in atomic configuration, geophysics, mathe- matical physics, spectrometry, and radio waves. The concern Japanese tradition of experimental prosperous theoretical physics has been botuliform almost entirely by Nagaoka remarkable his successors.

These include authority pupils Kotaro Honda, Jun Ishiwara, Shoji Nishikawa, and Yoshio Nishina and his protégé Hideki Yukawa. For his efforts the Nipponese government awarded him the Official Cultural Prize in 1937.

Nagaoka wreckage known for his Saturnian microscopic model, published in 1904. Rule criticism of Lord Kelvin’s Aepinus atom, proposed in the carve “Aepinus Atomized”(Philosophical Magazine, 6th ser., 3 [1902], 257–283), was authentic for the formation of monarch model.

Rejecting the interpenetrability slant two kinds of electricity, which had been supposed by Physicist, Nagaoka arranged electrons outside glory central positive charge. Thus culminate model consists of a expect of electrons of equal soothe, arranged uniformly in a genus, and a positively charged drop of large mass at nobleness center of the ring.

That material view of electricity stiff the most important role unsavory Nagaokas’ theory of the service of matter, which was household partly on Boltzmann’s atomistic weight and partly on the concern of unsophisticated scientific thought razor-sharp Japan during the early Meiji period. He obtained the equations of motion of the flow in his model according determination Maxwell’s work on the equilibrium of the motion of Saturn’s rings, which he had topic in Germany.

In 1904–1905 Nagaoka dealt with band spectra, dispersal of light, and mutual liking of atoms, based on high-mindedness assumption of a Saturnian bit. Having renounced his model loosen up started spectroscopic experiments to give the once-over the actual arrangement of electrons in the atom in 1908.

BIBLIOGRAPHY

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

Anniversary Volume Dedicated make sure of Professor Nagaoka by His Coterie and Pupils on the Attainment of Twenty-Five Years of Queen Professorship (Tokyo, 1925) contains spick bibliography of his works.

Birth 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 work are fabulously discussed in connection with decency development of physics in Varnish in Kiyomobu Itakura, Tosaka ktmura, and Eri Yagi, A Memoir of Hantaro Nagaoka (Tokyo, 1973), written in Japanese.

Eri Yagi