Today’s Accidental Invention…The Microwave Oven

Percy LeBaron Spencer was working on magnetrons—high-powered vacuum tubes that generate short radio waves called microwaves—when he accidentally discovered microwave cooking. The engineer was doing his job as usual when he noticed that the candy bar in his pocket had melted. Quickly Spencer realized that it was the magnetrons that were causing this phenomenon. By 1945, he had filed a patent for his metal cooking box powered by microwaves.

 

microwave prepared food

 

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