electromagnetic waves
An electromagnetic wave is the propagation of electromagnetic radiation through space, and theoretical aspects are related to the solution waveform supported Maxwell equations.
Unlike mechanical waves, electromagnetic waves do not require a material medium to propagate. waves are produced by the oscillation or acceleration of an electric charge. Electromagnetic waves are electric and magnetic components. Electromagnetic radiation can be ordered in a spectrum ranging from very high frequency waves (small wavelengths) to very low frequencies (higher wavelengths). Visible light is only a small portion of the electromagnetic spectrum.
Unlike mechanical waves, electromagnetic waves do not require a material medium to propagate. waves are produced by the oscillation or acceleration of an electric charge. Electromagnetic waves are electric and magnetic components. Electromagnetic radiation can be ordered in a spectrum ranging from very high frequency waves (small wavelengths) to very low frequencies (higher wavelengths). Visible light is only a small portion of the electromagnetic spectrum.
History of the discovery
The electromagnetic field in an environment variable is always manifested as a wave attenuated, although it can spread through space in a self-sustaining wave that does not require a means to propagate. This idea spread in the vacuum was strange at the time, and in time assumed the existence of ether holding these waves, a hypothesis that had to be discarded after the Michelson-Morley experiment ). Maybe greatest theoretical achievement of physics in the nineteenth century was the discovery of electromagnetic waves. The first indication was the unexpected relationship between electric phenomena and the speed of light.
approximate speed of 300,000 km / s is called with the letter c. All electromagnetic radiation spectrum presents the typical properties of wave motion, like diffraction and interference. Wavelengths ranging from billionths of a meter to several kilometers. The wavelength (l) and frequency (f) of electromagnetic waves, related by the expression l ° F = c, are important in determining its energy, its visibility, its power of penetration and other characteristics.
electromagnetic sources of litter are:
1. waves caused by the transmissions of radio stations and
2. waves caused by television broadcasts
3. the x-rays microwaves. The
1. waves caused by the transmissions of radio stations and
2. waves caused by television broadcasts
3. the x-rays microwaves. The
electromagnetic waves follow a straight path and speed is constant in each specific environment. In passing from one medium to another the only character ISTIC that remains constant is the frequency. The speed varies for each wavelength. The frequency and wavelength are related according to the following mathematical expression : Wavelength = CXT = C ÷ f
Prepared by:
JUAN PABLO CARDENAS MANCHEGO
7 º B
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