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Maxwell

In Our Time: Science

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The Unifying Theory of Electricity and Magnetism

In the mid-century gravity, electricity, magnetism, heat and light were understood but they seemed to be separate. The key development that Maxwell did was produce a unified theory of electricity and magnetism. He also introduced an extra sort of fictitious current which explained how a magnetic field can be produced in certain regions. When you inserted that into the equations, he could then produce this whole theory  in a mathematical sense.

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