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The Electromagnetic Spectrum: Radio Waves

The Electromagnetic Spectrum: Radio Waves. By: Hannah Kimball, Ilana Ruben, and Ella Cohen. Wavelength. Radio Waves have the longest wavelength of any wave on the Electromagnetic Spectrum. Radio Waves have wavelengths from infinity to 3 x 10 -1 meters. Frequency.

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The Electromagnetic Spectrum: Radio Waves

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  1. The Electromagnetic Spectrum: Radio Waves By: Hannah Kimball, Ilana Ruben, and Ella Cohen

  2. Wavelength • Radio Waves have the longest wavelength of any wave on the Electromagnetic Spectrum. • Radio Waves have wavelengths from infinity to 3 x 10-1 meters.

  3. Frequency • Radio Waves are the least energetic type of wave on the Electromagnetic Spectrum. • Radio Waves have a frequency between 1 x 104 Hertz to 1 x 108 Hertz. • Radio Waves can be found on the left end of the Electromagnetic Spectrum right next to Microwaves.

  4. Uses and Applications Radio Waves are useful for: • Radios and Cell phones • Televisions • Ships • Airplanes • Police and Radar • Satellites

  5. Visibility/Human Effects • Radio Waves are not visible to humans or any other type of organism. • Radio Waves are potentially damaging to humans. • Cell phones may cause brain tumors. • Radio Waves may raise your body temperature. • Radio Waves may damage your eyes.

  6. Discovery • Radio Waves were discovered by Heinrich Rudolf Hertz in around 1885. • He conducted an experiment using a ‘transmitter’ (a pair of metal rods with a gap between the two ends that are connected at the other ends to terminals of induction coils). • Using this device and other experiments, H. R. Hertz proved that radiation moves in wave pattern similar to light.

  7. Other Interesting Facts • The Federal Communications Commission (FCC) controls and regulates the use of Radio Waves to prevent communication overload and interference. • Radio Waves travel at the speed of light. • A radio picks up Radio Waves and turns the electrical signal into sound.

  8. Other Interesting Facts, cont. • There are two main types of Radio Waves: • AM (Amplitude Modulation) where the amplitude of the waves changes to match the signal from the radio station. • FM (Frequency Modulation) where the frequency changes to match the signal from the radio station. • “Mobile phones could kill far more people than smoking or asbestos, a study by an award winning cancer expert has concluded.”1 1 “Mobile Phones ‘more Dangerous than Smoking’-. “Web. 07 May 2010. http://www.independent.co.uk/life-style/health-and-families/health-news/mobile-phones-more-dangerous-than-smoking-802602.html.

  9. The MOST Interesting Fact • Radio Waves can be longer than a football field or shorter than a football!

  10. Bibliography "Electro Magnetic Spectrum." Discovery Education Classroom Resources. Web. 07 May 2010. <http://school.discoveryeducation.com/lessonplans/interact/electromagneticspectrum.html>. Huergo, J. "Radio Waves and Radar." Earth and Physical Sciences. Marshall Cavendish Digital, 2010. Web. 07 May 2010. . "Light II." Visionlearning. Web. 09 May 2010. <http://www.visionlearning.com/library/module_viewer.php?mid=138>. "Mobile Phones 'more Dangerous than Smoking' -." Web. 07 May 2010. <http://www.independent.co.uk/life-style/health-and-families/health-news/mobile-phones-more-dangerous-than-smoking-802602.html>. "Radio Wave." The World Book Student Discovery Science Encyclopedia. Chicago: World Book, 2006. 148. Print. "Radio Waves." NASA Science. Web. 07 May 2010. <http://science.hq.nasa.gov/kids/imagers/ems/radio.html>.

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