Microwaves

A zap oven, or zap, is a kitchen appliance using microwave radiation primarily to cook or agitate food. cook ovens keep changed food preparation since their use became general in the 1970s. Cooking food with microwaves was discovered by Percy Spencer composition twist magnetrons for radar sets at Raytheon, a major American defense contractor and industrial corporation. He was working on an vigorous radar set when he noticed a odd sensation, and saw that a peanut chocolate balk off he had in his pocket had started to melt. The radar had melt down his candy bar with microwaves. The first food to be intentionally cooked with microwaves was popcorn, and the second was an egg, which detonate in the face of one of the experimenters. In 1945, Raytheon filed a plain for Spencers cooking process using microwaves and in 1947, the company construct the first microwave oven, the Radarange. It was almost 6 feet tall and weighed 750 pounds. after several other models, which cost up of $3,000 retail, Raytheon introduced the first universal home model, the countertop Radarange in 1967 at a price of $495. Eventually, the microwave became available globally. When introduced in Japan, the Japanese companies erudite to build little expensive units by re-engineering a less(prenominal) expensive magnetron. on-line(prenominal) estimates hold that nearly 95% of American households have a microwave.

The microwave oven consists of a magnetron tube, which converts electricity into high frequence microwaves commonly at a frequency of 2.45 GHz (a wavelength of 12.24 cm). Microwaves argon a form of electromagnetic energy, like light waves or wireless waves, and occupy a pa rt of the electromagnetic spectrum. The pi! ddle supply molecules in the food (though overall hold a nonsubjective charge) mark a slightly negative oxygen division and ii slightly positive hydrogen atoms. When the microwaves hit the water molecules, If you indispensability to get a full essay, order it on our website: OrderEssay.net

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