Electromagnetic Needle Effect
by Science Photo Library
Title
Electromagnetic Needle Effect
Artist
Science Photo Library
Medium
Photograph - Photograph
Description
Electromagnetic needle effect. Historical illustration of an apparatus used to demonstrate the electromagnetic needle effect as described in 1820 by Danish physicist Hans Christian Oersted (1777-1851). Oersted observed that an electric current (from the battery at left) had a magnetic effect on an iron needle (right) floating on water. This experiment is seen as the foundation of the study of electromagnetism. The battery is shown with positive and negative terminals or electrodes (anode and cathode). Artwork from 'Electricite' (1911) by Max de Nansouty, part of the 'Les merveilles de la science' series of 1867-1891 by Louis Figuier.
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August 8th, 2016
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