- Computing & Information Technology
- Telecommunications and remote sensing
- Electromagnetic wave transmission
Electromagnetic wave transmission
Johnson, Walter C. Formerly, Department of Electrical Engineering, Princeton University, Princeton, New Jersey.
Last reviewed:June 2020
- Features of electromagnetic waves
- Radiation from an antenna
- Propagation over the Earth
- Hollow waveguides
- Two-conductor transmission lines
- Related Primary Literature
- Additional Reading
The transmission of electrical energy by wires, the broadcasting of radio signals, and the phenomenon of visible light are all examples of the propagation of electromagnetic energy. Electromagnetic energy travels in the form of a wave. Its speed of travel is approximately 186,000 mi/s (3 × 108 m/s) in a vacuum and is somewhat slower than this in liquid and solid insulators. An electromagnetic wave does not penetrate far into an electrical conductor, and a wave that is incident on the surface of a good conductor is largely reflected.
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