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lec2 - PEP112 Spring 2008 Prof Svetlana Malinovskaya 16...

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PEP112 – Spring 2008 Prof. Svetlana Malinovskaya 16 January 2008 The Electric Field
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The Concept of a Field Electric and magnetic forces, like gravity, are long-range forces What is the mechanism of action at a distance? Michael Faraday (1791-1867) proposed an idea that space itself round a magnet is filled with magnetic influence, that a magnet alters the space round it. Faraday’s idea came to be called a field. The field describes a function that assigns a value to every point in space. The alteration of the space around a mass is called the gravitational field, the space around a charge is altered to create the electric field.
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