"Ueber die Identitat der Schwingungen des Lichts mit den elektrischen Stromen."

8vo. Pages 243-263. [Entire volume: x, 660 pp.] Quarter brown cloth, marbled boards, gilt spine. Ex library ms. spine number, blind-stamp of the Carnegie Institution of Washington, Mount Wilson Observatory. Very good. FIRST EDITION of a paper that originally appeared in the Oversigt over det K. Danske Vidensh. Selsk. Forhandlung, No. 1, 1867. "Most impressive of all Lorenz' achievements in optics is his electromagnetic theory of light, developed in a relatively unknown paper of 1867, two years after Maxwell's famous paper on the same subject. At that time Lorenz did not know Maxwell's theory, and his own approach was quite different. Lorenz' electromagnetic theory of light can be described briefly as an interpretation of the light vector as the current density vector in a medium obeying Ohm's law. This paper contains the fundamental equations for the vector potential and the scalar potential For - for the first time - the corresponding retarded potentials expressed in terms of the current density vector and the electrical charge density. The concept of retarded potentials had already been introduced in an earlier paper by Lorenz in connection with research on the theory of elasticity. He found that the differential equation for the current density vector was the same as his fundamental wave equation for the light vector, completed with a term which explains the absorption of light in conducting media, and that his theory led to the correct value for the velocity of light." - DSB. DSB, VIII, pp. 501-502. First Edition.

Product Info

Publisher: Johann Ambrosius Barth, 1867.

Year: 1867

Type: Used

Binding: Softcover

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