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A microwave oven, or microwave, is a kitchen appliance employing microwave radiation primarily to cook or heat food. Microwave ovens have revolutionized food preparation since their use became widespread in the 1970s.
History
Cooking food with microwaves was discovered by Percy Spencer while building magnetrons for radar sets at Raytheon. He was working on an active radar set when he noticed a strange sensation, and saw that a peanut candy bar he had in his pocket started to melt. Although he was not the first to notice this phenomenon, as the holder of 120 patents, Spencer was no stranger to discovery and experiment, and realized what was happening. The radar had melted his candy bar with microwaves. The first food to be deliberately cooked with microwaves was popcorn, and the second was an egg (which exploded in the face of one of the experimenters). In North America, microwave popcorn is now one of the most commonly cooked items in microwave ovens, virtually to the exclusion of other home cooking methods such as hot air and oil popping. Most microwaves sold in North America today have a specific "popcorn button" which is solely used to cook premeasured packages of popcorn, ostensibly to make it easier for consumers to microwave popcorn without worrying about burning it or leaving a lot of kernels unpopped. The standard time for the "popcorn" setting on most microwaves is about three minutes.
On 8 October, 1945 Raytheon filed a patent for Spencer's microwave cooking process and in 1947, the company built the first microwave oven, the Radarange. It was almost 6 feet (1.8 m) tall and weighed 750 pounds (340 kg). It was water-cooled and produced 3000 watts, about three times the amount of radiation produced by microwave ovens today. An early commercial model introduced in 1954 generated 1600 watts and sold for $2,000 to $3,000. Raytheon licensed its technology to the Tappan Stove company in 1952. They tried to market a large, 220 volt, wall unit as a home microwave oven in 1955 for a price of $1,295, but it did not sell well. In 1965 Raytheon acquired Amana, which introduced the first popular home model, the countertop Radarange in 1967 at a price point of $495.
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@detlef_c microwave ovens are wonderful but your porrige should arrive to you at a perfect temperature :-)
Tittch (Rita McDonald Damper) Thu, 24 Dec 2009 10:59:36 -0000
@detlef_c microwave ovens are wonderful but your porrige should arrive to you at a perfect temperature :-)
I love microwave ovens...A kitchen n000b can have food at edible temprature even when mum isnt around :)
nitish (Nitish Upreti) Thu, 24 Dec 2009 07:32:42 -0000
I love microwave ovens...A kitchen n000b can have food at edible temprature even when mum isnt around :)
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