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A microwave oven or simply microwave is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. [1] This induces polar molecules in the food to rotate and produce thermal energy (heat) in a process known as dielectric heating .
In 1947, the first commercially produced microwave oven was about 6 feet tall, weighed about 750 lbs, and cost about $5,000 (equivalent to $70,410 in 2024). In 1967 the first more affordable, $495 (equivalent to $4,668 in 2024), and reasonably sized (counter-top) Radarange brand microwave oven was made available for sale, produced by Amana (a ...
He investigated cooking with microwaves and invented the microwave oven, consisting of a magnetron feeding microwaves into a closed metal cavity containing food, which was patented by Raytheon on 8 October 1945. Due to their expense microwave ovens were initially used in institutional kitchens, but by 1986 roughly 25% of households in the U.S ...
In 1947, just a year after Spencer’s snack food serendipity, the first commercial microwave oven hit the market. Called the “Radarange,” it weighed nearly 750 pounds and cost more than $2,000 .
Raytheon ranked 71st among U.S. corporations in the value of World War II military production contracts. [13] In 1945, Raytheon's Percy Spencer invented the microwave oven by discovering that the magnetron could rapidly heat food. In 1947, the company demonstrated the Radarange microwave oven for commercial use. [14]
Over time, ovens have become more high-tech in terms of cooking strategy. The microwave as a cooking tool was discovered by Percy Spencer in 1946, and with help from engineers, the microwave oven was patented. [12] The microwave oven uses microwave radiation to excite water molecules in food, causing friction and thus producing heat. [13]
Date invented Invented by Original purpose Civilian uses ASDIC: 1910s United Kingdom. France. Submarine detection Sonar: Radar: mid-1930s United Kingdom [1] [2] Early warning radar, air defence systems: Air traffic control systems, microwave oven: Walkie-talkie: 1930s Canada (Donald Hings) [3] United States (Alfred J. Gross, Motorola SCR-300)
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