microwave

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microwave,

electromagnetic wave having a frequency range from 1,000 megahertz (MHz) to 300,000 MHz, corresponding to a wavelength range from 300 mm (about 12 in.) to 1 mm (about 0.04 in.). Like light waves, microwaves travel essentially in straight lines. They are used in radar, in communications links spanning moderate distances, and in other applications, such as microwave ovensmicrowave oven,
device that uses microwaves to rapidly cook food. The microwaves cause water molecules in the food to vibrate, producing heat, which is distributed through the food by induction. A special electron tube called a magnetron produces the microwaves.
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. The equipment used to generate, process, and transmit microwaves is in many respects different from that used with lower frequency radio waves. See waveguidewaveguide,
device that controls the propagation of an electromagnetic wave so that the wave is forced to follow a path defined by the physical structure of the guide. Waveguides, which are useful chiefly at microwave frequencies in such applications as connecting the output
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; magnetronmagnetron
, vacuum tube oscillator (see electron tube) that generates high-power electromagnetic signals in the microwave frequency range. Its operation is based on the combined action of a magnetic field applied externally and the electric field between its electrodes.
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.

microwave

[′mī·krə‚wāv]
(electromagnetism)
An electromagnetic wave which has a wavelength between about 0.3 and 30 centimeters, corresponding to frequencies of 1-100 gigahertz; however, there are no sharp boundaries distinguishing microwaves from infrared and radio waves.

microwave

a. electromagnetic radiation in the wavelength range 0.3 to 0.001 metres: used in radar, cooking, etc.
b. (as modifier): microwave generator

microwave

Meaning "small wave," a microwave is a radio signal in the frequency range from 300 MHz to 300 GHz or from 1 to 300 GHz, depending on the rating system. Except for AM and FM radio, shortwave radio and over-the-air TV, almost all other communications systems transmit microwaves, including satellites, cellular systems, wireless LANs and line-of-sight between buildings and across vast distances. See spectrum and millimeter wave.


Early Microwave Tower
Line-of-sight microwaves were first used to transmit across long distances where the terrain was too difficult to lay cable. This tower was installed in 1969 in Boulder Junction, Colorado. (Image courtesy of AT&T.)
References in periodicals archive ?
Visit I Heart Keenwah NPEW Booth #5432 to discuss Microwavable Toasted Quinoa with co-founders Sarah Chalos and Ravi Jolly.
individual frozen microwavable dinners containing a waffle and a fried chicken piece with HUNGRY-MAN Selects BONELESS FRIED CHICKEN & WAFFLES printed on the label and bearing UPC code 658276202903.
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Ingredients manufacturers such as Budenheim will help to bring microwavable innovations to the market.
The frozen oyster meat samples were then packed in microwavable trays, sealed with film, and stored at about -20 C.
The global market for microwavable foods is forecast to reach $91 billion by 2015, according to Global Industry Analysts Inc.'s Microwavable Foods: A Global Strategic Business Report.
Closures and lids scored lower on fitting their needs than aseptic boxes for soup and microwavable cups and trays for whatever.
Full of potential as store is currently NOT doing: ATM, check cashing, phone cards, hot beverages (that's right-no coffee), microwavable items, fountain/frozen drinks...the list goes on.
Amy's Hot Breakfast Cereals are delicious, microwavable, and vegan!
Shoppers requested that ultra-convenient items, such as microwavable meals and microwavable soups, should be placed at the end of the aisle nearest the front of the store, and more time-intensive meals, such as boxed dinners and sides, including macaroni and cheese and add-meat-and-heat entrees, should be placed toward the back of the store.
In large microwavable bowl, mix cereal, pretzels and crackers.
Pop Secret is the second-largest microwavable popcorn maker in the United States, accounting for 25 percent of sales in the country's food stores, Diamond said.

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