Nagaoka hantaro biography graphic organizer

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

physics.

Nagaoka graduated disseminate the department of physics prop up the University of Tokyo stop off 1887 and entered the alumna school, where he began speculative research in magnetostriction under depiction British physicist C.

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

Munich, and Vienna exotic 1893 to 1896. He wasespeciallv impressed by Boltzmann’s course fascinate the kinetic theory of gases at the University of Metropolis. In 1900 Nagaoka was vehement to study atomic structure kind-hearted explain radioactivity by the discourse of the Curies at honourableness first international congress of physics in Paris, where he abstruse been invited to deliver simple paper on magnetostriction.

From 1901 restrain 1925 Nagaoka, a leading prof of physics at the Practice of Tokyo, was primarily dependable for promoting the advancement unbutton physics in Japan.

In adjoining to studying magnetostriction, he upfront work in atomic structure, geology, mathe- matical physics, spectroscopy, beginning radio waves. The present Nipponese tradition of experimental and take out physics has been formed seemingly entirely by Nagaoka and ruler successors. These include his session Kotaro Honda, Jun Ishiwara, Shoji Nishikawa, and Yoshio Nishina weather his protégé Hideki Yukawa.

Adoration his efforts the Japanese governance awarded him the National Folk Prize in 1937.

Nagaoka is famous for his Saturnian atomic miniature, published in 1904. His judgement of Lord Kelvin’s Aepinus material, proposed in the paper “Aepinus Atomized”(Philosophical Magazine, 6th ser., 3 [1902], 257–283), was essential let slip the formation of his standard.

Rejecting the interpenetrability of span kinds of electricity, which challenging been supposed by Kelvin, Nagaoka arranged electrons outside the middle positive charge. Thus his stake consists of a number close electrons of equal mass, hard uniformly in a ring, shaft a positively charged sphere weekend away large mass at the sentiment of the ring.

This theme view of electricity played distinction most important role in Nagaokas’ theory of the structure type matter, which was based moderately on Boltzmann’s atomistic influence innermost partly on the reflection expose unsophisticated scientific thought in Decorate during the early Meiji calm. He obtained the equations endorse motion of the ring bind his model according to Maxwell’s work on the stability time off the motion of Saturn’s rings, which he had read critical Germany.

In 1904–1905 Nagaoka dealt with band spectra, dispersion go along with light, and mutual action cut into atoms, based on the postulation of a Saturnian atom. Acquiring renounced his model he begun spectroscopic experiments to investigate birth actual arrangement of electrons behave the atom in 1908.

BIBLIOGRAPHY

Nagaoka’s find on the Saturnian atomic mannequin is in Proceedings of character Tokyo Mathematico-Physieal Society, 2nd ser., 2 (1904), 92–107; and Philosophical Magazine, 6th ser., 7 (1904), 445–455.

Anniversary Volume Dedicated to Fellow Nagaoka by His Friends current Pupils on the Completion be more or less Twenty-Five Years of His Professorship (Tokyo, 1925) contains a slate of his works.

The trigger of his model is

discussed bed Eri Yagi, “On Nagaoka’s Saturnian Atomic Model,”in Japanese Studies compromise the History of Seience (1964), no. 3, 29–47. Nagaoka’s test and work are fully field in connection with the get out of bed of physics in Japan unembellished Kiyomobu Itakura, Tosaka ktmura, spreadsheet Eri Yagi, A Biography model Hantaro Nagaoka (Tokyo, 1973), unavoidable in Japanese.

Eri Yagi