They are about 100 000 times longer than visible light waves. They can range from the length of a football to longer than a football field.
Radio waves are produced by:
- Acceleration of electrons
- Planets and comets
- Stars and galaxies
- Clouds of gas and dust
Radio waves is used to:
- Transfer signal to
- cell phones
- Observe space
The advantage of radio wave telescopes is that they are not affected by sunlight, clouds and rain.
The disadvantage of them is that they have to cover a large area to be able to obtain a clear picture.
Some people claim that the very low frequency field from overhead power cables near their homes has affected their health.
How do you make a radio wave?: http://www.qrg.northwestern.edu/projects/vss/docs/communications/3-how-do-you-make-a-radio-wave.html
Netting, R. (2007). Radio waves. Retrieved July 7, 2011, from: http://science.hq.nasa.gov/kids/imagers/ems/radio.html
Amazing Space. (n.d.). Definition: radio waves. Retrieved July 7, 2011, from: http://amazing-space.stsci.edu/resources/explorations/groundup/lesson/glossary/term-full.php?t=radio_waves
Wolfs, F. (n.d.). Light and radio waves. Retrieved July 7, 2011, from: http://teacher.pas.rochester.edu/phy122/Lecture_Notes/Chapter36/chapter36.html