In 1945 Percy Lebaron Spencer invented the microwave

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• In 1945 Percy Lebaron Spencer invented the
  microwave

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Accidental Discovery

• When standing in front of a magnetron he noticed
  that the chocolate bar in his pocket begun to
  melt

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1st microwave

• Weighed 750 pounds and was 5 feet 6 inches

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It was used only
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• Through many modifications, we can now use
  microwaves for everyday use