Wave - Electromagnetic Waves

Electromagnetic Waves

(radio, micro, infrared, visible, uv)

An electromagnetic wave consists of two waves that are oscillations of the electric and magnetic fields. An electromagnetic wave travels in a direction that is at right angles to the oscillation direction of both fields. In the 19th century, James Clerk Maxwell showed that, in vacuum, the electric and magnetic fields satisfy the wave equation both with speed equal to that of the speed of light. From this emerged the idea that light is an electromagnetic wave. Electromagnetic waves can have different frequencies (and thus wavelengths), giving rise to various types of radiation such as radio waves, microwaves, infrared, visible light, ultraviolet and X-rays.

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Other articles related to "electromagnetic waves, waves, electromagnetic wave, wave, electromagnetics, electromagnetic":

Longitudinal Wave - Electromagnetic
... Maxwell's equations lead to the prediction of electromagnetic waves in a vacuum, which are transverse (in that the electric fields and magnetic fields vary perpendicularly to the direction of ... However, waves can exist in plasmas or confined spaces, called plasma waves, which can be longitudinal, transverse, or a mixture of both ... Plasma waves can also occur in force-free magnetic fields ...
Speed Of Electricity - Electromagnetic Waves
... signals travel down a cable is actually the speed of the electromagnetic wave, not the movement of electrons ... Electromagnetic wave propagation is fast and depends on the dielectric constant of the material ... In a vacuum the wave travels at the speed of light and almost that fast in air ...
Nathan Marcuvitz - Biography
... stands out clearly as the leading figure in the field of electromagnetic waves for the period of at least two decades following World War II ... He was widely viewed by his colleagues as the premier electromagnetics scholar of his generation." Electromagnetic waves achieved practical fruition in the development of microwave ... magnetron furnished a reliable source of electromagnetic waves and made radar feasible, but progress was initially slow because designs had employed empirical and cut-and-try procedures ...
Sergei Alexander Schelkunoff - Selected Works
... Publications "Electromagnetic Waves in Conducting Tubes", Phys ... "On Diffraction and Radiation of Electromagnetic Waves", Phys ... Electromagnetic waves, New York D ...
Invention Of Radio - Physics of Wireless Signalling
... Several different electrical, magnetic or electromagnetic physical phenomena can be used to transmit signals over a distance without intervening wires ... Magnetic induction Capacitive coupling Electromagnetic waves All these physical phenomena, as well as various other ideas such as conduction through air, were ... There was no theory of electromagnetic wave propagation to guide experiments before Maxwell's treatise and its verification by Hertz and others ...

Famous quotes related to electromagnetic waves:

    What is history? Its beginning is that of the centuries of systematic work devoted to the solution of the enigma of death, so that death itself may eventually be overcome. That is why people write symphonies, and why they discover mathematical infinity and electromagnetic waves.
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