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Microwaves are electromagnetic waves with wavelengths ranging from 1 mm to 1 m, or frequencies between 0.3 GHz and 300 GHz.

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Wikipedia about microwave

Microwaves are electromagnetic waves with wavelengths ranging from 1 mm to 1 m, or frequencies between 0.3 GHz and 300 GHz.

Apparatus and techniques may be described qualitatively as "microwave" when the wavelengths of signals are roughly the same as the dimensions of the equipment, so that lumped-element circuit theory is inaccurate. As a consequence, practical microwave technique tends to move away from the discrete resistors, capacitors, and inductors used with lower frequency radio waves. Instead, distributed circuit elements and transmission-line theory are more useful methods for design, analysis. Open-wire and coaxial transmission lines give way to waveguides, and lumped-element tuned circuits are replaced by cavity resonators or resonant lines. Effects of reflection, polarization, scattering, diffraction, and atmospheric absorption usually associated with visible light are of practical significance in the study of microwave propagation. The same equations of electromagnetic theory apply at all frequencies.

While the name may suggest a micrometer wavelength, it is better understood as indicating wavelengths very much smaller than those used in radio broadcasting. The boundaries between far infrared light, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary and are used variously between different fields of study. The term microwave generally refers to "alternating current signals with frequencies between 3 GHz (3×109 Hz) and 300 GHz (3×1011 Hz)." Both IEC standard 60050 and IEEE standard 100 define "microwave" frequencies starting at 1 GHz (30 cm wavelength).

Electromagnetic waves longer (lower frequency) than microwaves are called "radio waves". Electromagnetic radiation with shorter wavelengths may be called "millimeter waves", terahertz radiation or even T-rays. Definitions differ for millimeter wave band, which the IEEE defines as 110 GHz to 300 GHz.

Discovery

The existence of electromagnetic waves, of which microwaves are part of the electromagnetic spectrum, was predicted by James Clerk Maxwell in 1864 from his equations. In 1888, Heinrich Hertz was the first to demonstrate the existence of electromagnetic waves by building an apparatus that produced and detected microwaves in the UHF region. The design necessarily used horse-and-buggy materials, including a horse trough, a wrought iron point spark, Leyden jars, and a length of zinc gutter whose parabolic cross-section worked as a reflection antenna. In 1894 J. C. Bose publicly demonstrated radio control of a bell using millimetre wavelengths, and conducted research into the propagation of microwaves.

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Search results for Microwave

Microwaves from Whirlpool

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Microwave Ovens and Food Safety

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Microwave cooking can cause a lot of illness particularly cancer. ... Who invented microwave ovens, and why? The answers to these questions may shock you into ...www.mercola.com/article/microwave/hazards.htm

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Kraft Interactive Kitchen

Features include a meal and party planner, shopping list creator, and more.www.kraftfoods.com/

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News about Microwave

Hittite Microwave Corporation to Release Third Quarter 2008 Financial Results on October 23, 2008

PR Newswire via Yahoo! Finance Hittite Microwave Corporation plans to announce its financial results for the third quarter ended September 30, 2008 after the close of market on Thursday, October 23, 2008.http://biz.yahoo.com/prnews/080930/aqtu074.html?.v=65

NZ firm to microwave forest waste into charcoal

ABC Radio AustraliaA New Zealand company claims to have patented world-first industrial technology to microwave forest waste into carbon reducing charcoal.http://www.radioaustralia.net.au/news/stories/200809/s237832...

RF CENTRAL PRX-II HANDHELD RECEIVER OFFERS APPLICATION OPTIONS AT IBC 2008

Broadcast NewsroomDMN Newswire--2008-10-2--RF Central, a leading provider of digital microwave technology, rolled out its new RFX-PRX-II portable handheld COFDM monitor/receiver at IBC. Ideal for a wide range of applications including ENG confidence monitoring and security surveillance, this lightweight palm-sized receiver (available in 2 GHz and 5.8 GHz) is packaged in a compact housing that spans just 16 x 12 x ....http://www.broadcastnewsroom.com/articles/viewarticle.jsp?id...

NUCOMM NEWSCASTER DR 2 DIVERSITY RECEIVER DEBUTS AT IBC 2008

Broadcast NewsroomDMN Newswire--2008-10-2--Nucomm, Inc., a brand of The Vitec Group, and a leading provider of digital and analog microwave systems for the broadcast industry, common carrier, cable, government, military and international marketplace, unveiled the Newscaster DR 2 diversity receiver at IBC 2008. The updated model of its industry leading predecessor, the Newscaster DR, offers new features including .....http://www.broadcastnewsroom.com/articles/viewarticle.jsp?id...

2007 VOLVO VNL64T630

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News about Microwave

Teens Arrested For Breaking Into Concession Stand, School

MSNBCOnce inside, Edwards said they damaged trophies, football uniforms, a pretzel machine and a microwave oven while stealing popcorn, candy and pop.http://www.msnbc.msn.com/id/26722379/

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Terra DailyShort for Hurricane Imaging Radiometer, HIRAD is designed to scan large areas of ocean for microwave signals that portend storm strength and dynamics.http://www.terradaily.com/reports/Spooky_Hurricane_Science_9...

A Shareholder Filed A Class Action Lawsuit Against Harris Stratex ...

PR InsideHSTX) Over Alleged Materially False And Misleading Statements About Its Financial Condition Prior To And Following Its Merger Between Stratex Networks, Inc And The Harris Microwave Communications Divisionhttp://www.pr-inside.com/a-shareholder-filed-a-class-action-...

Exalt Communications Introduces the Industry's Fastest 5 GHz Microwave ...

TMCnetCAMPBELL, Calif., Sept. 15 /PRNewswire/ -- Exalt Communications (http://www.exaltcom.com/), the leading innovator in next-generation wireless backhaul, today introduced EX-r GigE series (http://www.exaltcom.com/products/EX-5r-GigE.htm) of microwave ... http://www.tmcnet.com/usubmit/-exalt-communications-introduc...

Finicky pears can be cooked in great meals

Carroll County OnlineAlternatively, the nuts can be browned in a microwave. Place the nuts in a single layer on a microwave-safe plate, and microwave on high power for 2 to 3 minutes, or until lightly browned.http://www.carrollcountytimes.com/articles/2008/09/16/featur...

Search results for Microwave

Microwave Working Group Home Page

Bridging Science, Technology and Applications" Global Congress on Microwave Energy Applications "The New Flame for Humanity" Now Available! Book of Proceedingshttp://www.microwave-rf.org/

Microwave Technology Corporation

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Microwave Cooking Talk :: View topic - Safety of Food Cooked in ...

Quote: February 26, 2002 I have just become aware of the research of Hertel and Blanc in Switzerland, and how a "gag order" was placed on Hertel by the Swiss courts, which ... http://www.microwavecookingforone.com/phpBB/viewtopic.php?t=...

Microwave Components, Inc. - Design Guidelines

A leading manufacturer of air core miniature inductors. Microwave Components, Inc. P.O. Box 4132 South Chelmsford, MA 01824 Phone: 978-256-8251http://www.microwavecoil.com/

Microwave - Panasonic, Sharp, Black, Stainless Steel Microwave Oven ...

Microwave: Read reviews, compare prices and find best selling on Sharp, Panasonic, Black, Stainless steel and all microwave ovens.http://www.microwave.org.uk/
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Videos found for Microwave

Is It A Good Idea To Microwave A Ba...

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Microwave Messes

Microwave MessesCleaning the inside of a microwave oven is easy with this great tip!Windows Media - Video

Cat Survives Bout with Microwave

Cat Survives Bout with MicrowaveA Michigan family's cat is lucky to be alive after their 3-year old toddler stuck him in the microwave. The kitten suffered severe burns and had to have its ears, ta...Video - Video

The Grabowskis Microwave Repair

The Grabowskis Microwave RepairWhen Cliff attempts to repair his microwave he gets more than he ever hoped for!Flash - Video

Balloon vs. Microwave

Balloon vs. MicrowaveA balloon is placed in a microwave, and the results are surprisingly explosive.Flash - Video

Videos found for Microwave

Panasonic NN-T785SF 1250W microwave...

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Kenmore Quicktouch microwave User R...

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Answers for Microwave

shellsandscripts

Why does my microwave start working only when the oven has been on?

shellsandscriptsI think you need an electrician to come and check your wiring. The microwave and range should be on separate circuits, by code, and there may be some sort of short going on. Whatever the case, it do...
San Diego Art Nut

Is there a general time to microwave leftovers to assure they are safe to eat?

San Diego Art NutMicrowaving is just for a quick reheat. If you have improperly stored your food, then you are in trouble. If you have to cook it longer than a reheat when the food is already cooked, then you are goin...
marklbishop

What is quicker? Microwaving a whole potato or the same sliced potato in the microwave?

marklbishopObviously faster to cook slices, since there's more surface of the potato exposed to the heat source (or whatever, in a microwave) ..........but for the potato to taste good, (sliced or not), you shou...
GraysAnatoy

Does microwaving have any effect on foods? What are the best foods to microwave with?

GraysAnatoyi use mine primarily to boil a mug of water for tea, warm leftovers, and make popcorn, or microwave dinners. Anything else I use the stove for better taste. I'd probably melt cheese on the stove.
Talup

Do microwave ovens have fuses? Can a microwave oven be repaired?

TalupI am a microwave cook. We use ours everyday. They do not last for years. I have to buy a new one between three to five years. I just bought a new one and it only cost $60+. 1100 watts. They ...

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