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Ultimately, Ampere formulated a general expression – called Ampere's Law – for determining the magnetic field created by any distribution of electric currents. Ampere found that two long, straight wires carrying current in the same direction would attract each other, and two wires carrying current in opposite directions would repel each other (click on the Interactive Animation links for a demonstration). This planted the seed for Andre Ampere, a French physicist, to demonstrate that two current-carrying wires would interact with each other due to the magnetic field that they generated.
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Oersted discovered that a wire carrying electric current could deflect the needle of a magnetic compass. The earliest experimental connection between electricity and magnetism came in the 1820s from the work of the Danish physicist Hans Christian Oersted. Early experiments in electricity and magnetism His new theory was aptly named a theory of electromagnetism. Maxwell's work synthesized these two ideas, which had previously been considered separate phenomena. Throughout the nineteenth century, many of science's greatest minds dedicated themselves to the study of two exciting new ideas: electricity and magnetism. In 1873, seventy years after Thomas Young presented his experimental results on the nature of light (see our Light I: Particle or Wave? module), a Scottish physicist named James Clerk Maxwell published a theory that accounted for the physical origins of light. Understanding Scientific Journals and Articles.Using Graphs and Visual Data in Science.Scientists and the Scientific Community.Scientific Notation and Order of Magnitude.The Case of the Ivory-billed Woodpecker.
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Santiago Ramón y Cajal and Camillo Golgi.Factors that Control Earth's Temperature.Plates, Plate Boundaries, and Driving Forces.Solutions, Solubility, and Colligative Properties.Y-Chromsome and Mitochondrial DNA Haplotypes.Absorption, Distribution, and Storage of Chemicals.