Radio Waves by Christopher Donaldson

Position on the EM Spectrum

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Radio waves have a lower frequency than microwave.

Characterisitcs of Radio Waves

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-Frenquencies from 3KHz to 300 GHZ
-Wavelengths from one millimeter to 100 kilometers.
-FM radio waves have wavelengths of around 3 meters. Radio waves used for TV have a wavelngth of around 30 meters, and FM radio has waves of around 3km.
-Able to reflect off of earths atmosphere

Health Effects

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For the most part Radio waves are completely safe, although, simmilar to microwaves, higher frequency can cause materials like food and body tissues to heat up, but this does not typically occur.

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Uses

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Radio waves were discovered in the 1880's, and radio communication was invented in 1895 by Guglielmo Marconi. Radio waves are used in many forms of communication and entertainment, as well as in other ways. Cell phones use radio waves for calling, and radio waves have been used extensively in wars to send messages and are used in radar. Analog television also operates on radio waves, and remote control vehicles also use radio waves.

A Radio Transmitter

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Guglielmo Marconi

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Inventor of Radio Communication

Radar

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Radar operates using radio waves

Harmful or Helpful

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Radio waves are helpful in many ways. Radio was one of the first forms of mass communication, and many other technologies would not be possible without radio waves. They can reflect off of the atmosphere which means they can be transmitted from one side of the world, and be able to reach the other. Radio waves are used in many aspects of our life.

Bibliography

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N.p., n.d. Web. 25 Apr. 2017. <https://www.boundless.com/physics/textbooks/...waves-23/.../radio-waves-592-11171/>.

N.p., n.d. Web. 25 Apr. 2017.

<www.bbc.co.uk/schools/gcsebitesize/science/.../the_electromagnetic_spectrumrev6.shtml>.

Dunbar, Brian. "What Are Radio Waves?" NASA. NASA, 06 May 2015. Web. 26 Apr. 2017. <https://www.nasa.gov/directorates/heo/scan/communications/outreach/funfacts/txt_radio_spectrum.html>.