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Magnetism is very common to everything you see, for it is an essential ingredient for light itself. The term magnetism comes from a rock called lodestones. In the twelfth century the chinese used them for navigating ships, lodestone got its name from its uses in navigation lode=lead, lodestone = (lead ingstone). We discoverd magnets exerted forces on current carrying wires, which led to electric motors and meters. It was a whole new technology which would bring electric powerd radio, and television. Nature was revealing another one of its secrets. |