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H. C. Ørsted : ウィキペディア英語版
Hans Christian Ørsted

Hans Christian Ørsted (;〔("Oersted" ). ''Random House Webster's Unabridged Dictionary''.〕 ; often rendered Oersted in English; 14 August 17779 March 1851) was a Danish physicist and chemist who discovered that electric currents create magnetic fields, an important aspect of electromagnetism. He is still known today for Oersted's Law. He shaped post-Kantian philosophy and advances in science throughout the late 19th century.〔Brian, R.M. & Cohen, R.S. (2007). Hans Christian Ørsted and the Romantic Legacy in Science, ''Boston Studies in the Philosophy of Science'', Vol. 241.〕
In 1824, Ørsted founded ''Selskabet for Naturlærens Udbredelse'' (SNU), a society to disseminate knowledge of the natural sciences. He was also the founder of predecessor organizations which eventually became the Danish Meteorological Institute and the Danish Patent and Trademark Office. Ørsted was the first modern thinker to explicitly describe and name the thought experiment.
A leader of the so-called Danish Golden Age, Ørsted was a close friend of Hans Christian Andersen and the brother of politician and jurist Anders Sandøe Ørsted, who eventually served as Danish prime minister (1853–54).
The oersted (Oe), the cgs unit of magnetic H-field strength, is named after him.
==Early life and studies==

Ørsted was born in Rudkøbing. As a young boy Ørsted developed his interest in science while working for his father, who owned a pharmacy.〔(【引用サイトリンク】title=Hans Christian Ørsted )〕 He and his brother Anders received most of their early education through self-study at home, going to Copenhagen in 1793 to take entrance exams for the University of Copenhagen, where both brothers excelled academically. By 1796 Ørsted had been awarded honors for his papers in both aesthetics and physics. He earned his doctorate in 1799 for a dissertation based on the works of Kant entitled "The Architectonics of Natural Metaphysics".
In 1801 Ørsted received a travel scholarship and public grant which enabled him to spend three years travelling across Europe. In Germany he met Johann Wilhelm Ritter, a physicist who believed there was a connection between electricity and magnetism. This made sense to Ørsted since he believed in Kantian ideas about the unity of nature and that deep relationships existed between natural phenomena.〔
Their conversations drew Ørsted into the study of physics. He became a professor at the University of Copenhagen in 1806 and continued his research with electric currents and acoustics. Under his guidance the University developed a comprehensive physics and chemistry program and established new laboratories.
In 1800, Alessandro Volta discovered a galvanic battery inspiring Ørsted to think about the nature of electricity and to conduct his first electrical experiments. Between 1800 to 1803, he visited to Germany, France and Holland for lectures. Ørsted welcomed William Christopher Zeise to his family home in autumn 1806; taking the then young chemist (and fellow son of a pharmacist) under his care and giving him encouragement while offering him a position as his lecturing assistant. In 1812 he again visited Germany and France after publishing a manual called ''Videnskaben om Naturens Almindelige Love'' and ''Første Indledning til den Almindelige Naturlære'' (1811). In Berlin he wrote his famous essay on the identity of chemical and electrical forces in which he first stated the connection existing between magnetism and electricity. Then, in Paris he translated that essay in Latin with Marcel de Serres.
The Royal Society of London gave him the Copley Medal and the French Academy awarded him with 3,000 gold francs. Ørsted was just 43 when he made this great discovery. He established the Royal Polytechnic Institute in 1829 of which he was the first director.

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