October 19, 2009

Lightning Model

Photograph by Westinghouse Electric Corp

This Month in Photo of the Day: Images from the National Geographic Archive

Westinghouse engineers use this miniature system for tests. Upper wires detour the three-million-volt harmlessly to the ground. Lower wires, which carry the power load, are thereby protected against lightning, which might shut off the current or damage equipment. Even the cows are man-made.


From the National Geographic book National Geographic Image Collection.

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