Electromagnetic radiation
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Electromagnetic radiation (EM radiation or EMR) is one of the fundamental phenomena of electromagnetism, behaving as waves propagating through space, and also as photon particles traveling through space, carrying radiant energy. In a vacuum, it propagates at a characteristic speed, the speed of light, normally in straight lines. EMR is emitted and absorbed by charged particles. As an electromagnetic wave, it has both electric and magnetic field components, which oscillate in a fixed relationship to one another, perpendicular to each other and perpendicular to the direction of energy and wave propagation.
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See also
- Antenna (radio)
- Antenna measurement
- Bioelectromagnetism
- Bolometer
- Control of electromagnetic radiation
- Electromagnetic field
- Electromagnetic pulse
- Electromagnetic radiation and health
- Electromagnetic spectrum
- Electromagnetic wave equation
- Evanescent wave coupling
- Finite-difference time-domain method
- Helicon
- Impedance of free space
- Light
- Maxwell's equations
- Near and far field
- Radiant energy
- Radiation reaction
- Risks and benefits of sun exposure
- Sinusoidal plane-wave solutions of the electromagnetic wave equation
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