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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 .
Grab-it is a brand of Corning Ware cookware products easily identifiable by their uniform distinctive shape: a bowl with vertical sides and a rounded, concave tab handle. . The name was first used for a versatile product which could safely go from refrigerator to stovetop, oven, broiler, or microwave, but later, inferior products, nearly identical in appearance but unsafe for stovetop or ...
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]
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In 1897, William Hadaway was granted US patent # 574537 for an "Automatically Controlled Electric Oven". [5] Drawings submitted on 29 November 1905 when David Curle Smith obtained an Australian patent (No. 4699/05) for his "electric cooking stove", also known as "The Kalgoorlie Stove".
A microwave cavity or radio frequency cavity (RF cavity) is a special type of resonator, consisting of a closed (or largely closed) metal structure that confines electromagnetic fields in the microwave or RF region of the spectrum. The structure is either hollow or filled with dielectric material. The microwaves bounce back and forth between ...
1945 Microwave oven. A microwave oven with a turntable. A microwave oven cooks or heats food by dielectric heating. Cooking food with microwaves was discovered by Percy Spencer on October 8, 1945, while building magnetrons for radar sets at Raytheon. Spencer was working on an active radar set when he noticed a strange sensation, and saw that a ...
The depth of penetration depends on the frequency of the microwaves and the tissue type. The Active Denial System ("pain ray") is a less-lethal directed energy weapon that employs a microwave beam at 95 GHz; a two-second burst of the 95 GHz focused beam heats the skin to a temperature of 130 °F (54 °C) at a depth of 1/64th of an inch (0.4 mm) and is claimed to cause skin pain without lasting ...
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