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Unveiling Microwaves: Applications and Discoveries

Explore the fascinating world of microwaves, ranging from communications to microwave ovens, radar systems to WiFi connections, and the potential health effects on humans. Learn about their discovery by Heinrich Hertz and their current uses in various fields. Discover how these waves are being harnessed for innovation and exploration, including their potential in the search for extraterrestrial life.

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Unveiling Microwaves: Applications and Discoveries

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  1. Microwaves By Radha Sharma, Alison Valley and Elizabeth Shenson

  2. Microwaves • Range of wavelengths: 1m-1mm • Range of frequency: 300MHz - 300GHz • Between radio waves and infared waves in Electromagnetic Spectrum

  3. Uses of Microwaves • Communications • Microwaves were used because their long wavelengths allowed them to travel far while being accurate to their location.

  4. Radar • Microwaves can detect the speed and range of remote objects • Air traffic control, automatic doors and weather forecasting find microwave radar useful.

  5. Microwave ovens • These types of ovens send microwave radiation waves though food causing it to heat up. • Microwave ovens heat up everyday food making cooking much easier.

  6. WiFi connection • At a low intensity, the high frequency of microwaves allows the connection to travel to far places and create internet sources.

  7. Government communication • Government officials rely on microwaves high frequency to communicate through long distance phone calls.

  8. Are radio waves damaging to humans? • Low energy can cause severe burning • Can heat human body organs; may cause damage is body is unable to dissipate heat • Can cause hearing sensations • Research is being done to see if the waves cause harm to the immune system and central nervous system.

  9. Who? Heinrich Rudolf Hertz, a German physicist, is responsible for the proving and demonstrating the existence of microwaves in 1886

  10. How were microwaves discovered? • In 1865, a British mathematician named James Clerk Maxwell theorized the existence of electromagnetic by means of equations • Assuming that Maxwell’s ideas were correct, Hertz carried out an experiment to produce these waves

  11. The Experiment • The experiment consisted of an oscillator made of brass knobs that were connected to an to an in induction coil and separated by a gap, over which sparks could jump

  12. When the sparks appeared on the receiver, it was clear that electromagnetic waves were being transmitted

  13. Interesting Facts • The SETI (Search For Extraterrestrial Intelligence) uses microwaves to search for aliens • Since microwaves do not occur in nature, any evidence of them could mean extraterrestrial life

  14. Bibliography • "Animal Senses: Sight Smell Taste and Touch as Well as Other Senses." Saltwater Fish. Web. 13 May 2010. <http://fishinsects.suite101.com/article.cfm/animal_senses>.  • The Electromagnetic Spectrum. Photograph. Web.  • "The Electromagnetic Spectrum Tutorial." Http://www.klimaforschung.net. Web. <http://www.klimaforschung.net/electromagneticspectrum%5B1%5D.swf>.  • "The Electromagnetic Spectrum Tutorial." Http://www.klimaforschung.net. Web. <http://www.klimaforschung.net/electromagneticspectrum%5B1%5D.swf>.  • "File:Heinrich Rudolf Hertz.jpg." Wikipedia, the Free Encyclopedia. Web. 14 May 2010. <http://en.wikipedia.org/wiki/File:Heinrich_Rudolf_Hertz.jpg>.  • "Heinrich Hertz: The Discovery of Radio Waves." The Orchid Grower: A Juvenile Science Adventure Novel. Web. 14 May 2010. <http://www.juliantrubin.com/bigten/hertzexperiment.html>.  • "Heinrich Rudolph Hertz." Corrosion Science and Engineering Information Hub. Web. 14 May 2010. <http://corrosion-doctors.org/Biographies/HertzBio.htm>.  • "Inventor Heinrich Hertz." The Great Idea Finder - Celebrating the Spirit of Innovation. Web. 14 May 2010. <http://www.ideafinder.com/history/inventors/hertz.htm>.  • "Microwave Health Effects." NEWTON/ANL Home Page. Web. 14 May 2010. <http://www.newton.dep.anl.gov/askasci/gen99/gen99445.htm>.  • "Microwave." Wikipedia, the Free Encyclopedia. Web. 13 May 2010. <http://en.wikipedia.org/wiki/Microwave>.  • "Microwaves." NASA Science. Web. 14 May 2010. <http://science.hq.nasa.gov/kids/imagers/ems/micro.html>.  • "WikiAnswers - How Are Electromagnetic Waves Harmful to Humans." WikiAnswers - The Q&A Wiki. Web. 14 May 2010. <http://wiki.answers.com/Q/How_are_electromagnetic_waves_harmful_to_humans>. 

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