electromagnetic spectrum wikipedia - EAS

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    Electromagnetic spectrum - Wikipedia

    https://en.wikipedia.org/wiki/Electromagnetic_spectrum

    The electromagnetic spectrum is the range of frequencies (the spectrum) of electromagnetic radiation and their respective wavelengths and photon energies. The electromagnetic spectrum covers electromagnetic waves with frequencies ranging from below one hertz to above 10 hertz,

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    History and discovery

    Humans have always been aware of visible light and radiant heat but for most of history it was not known that these phenomena were connected or were representatives of a more extensive principle. The ancient Greeksrecognized

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    Range

    Electromagnetic waves are typically described by any of the following three physical properties: the frequency f, wavelength λ, or photon energyE. Frequencies observed in

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    Regions

    The types of electromagnetic radiation are broadly classified into the following classes (regions, bands or types):
    1. Gamma radiation
    2. X-ray radiation

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    See also

    • Bandplan
    • Cosmic ray
    • Digital dividend after digital television transition

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    External links

    • Australian Radiofrequency Spectrum Allocations Chart (from Australian Communications and Media Authority)
    • Canadian Table of Frequency Allocations

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    Types of radiation

    Radio waves
    Radio waves are emitted and received by antennas, which consist of conductors such as metal rod

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  2. Electromagnetic spectrum - Simple English Wikipedia, the ...

    https://simple.wikipedia.org/wiki/Electromagnetic_spectrum

    The electromagnetic (EM) spectrum is the range of all possible electromagnetic radiation.Electromagnetic radiation can be divided into octaves — as sound waves are — adding up to eighty-one octaves. Physicists have studied electromagnetic radiation with wavelengths from thousands of kilometres down to fractions of the size of an atom.It is commonly said that …

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    • Electromagnetic radiation - Wikipedia

      https://en.wikipedia.org/wiki/Electromagnetic_radiation

      EM radiation (the designation 'radiation' excludes static electric and magnetic and near fields) is classified by wavelength into radio, microwave, infrared, visible, ultraviolet, X-rays and gamma rays. Arbitrary electromagnetic waves can be expressed by Fourier analysis in terms of sinusoidal monochromatic waves, which in turn can each be classified into these regions of the EMR spectrum.

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    • Electromagnetic spectrum - Wikiwand

      https://www.wikiwand.com/en/Electromagnetic_spectrum

      The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies.

    • Elektromagnetisches Spektrum – Wikipedia

      https://de.wikipedia.org/wiki/Elektromagnetisches_Spektrum
      • Das elektromagnetische Spektrum, auch elektromagnetisches Wellenspektrum, ist die Gesamtheit aller elektromagnetischen Wellen verschiedener Wellenlängen. Das Lichtspektrum, auch Farbspektrum, ist dabei der vom Menschen sichtbare Anteil des elektromagnetischen Spektrums.
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      What is the electromagnetic spectrum?
      The Electromagnetic (EM) Spectrum is the range of all possible electromagnetic radiation. Electromagnetic radiation can be divided into octaves — as sound waves are — adding up to eighty-one octaves.

      Electromagnetic spectrum - Simple English Wikipedia, the

      simple.wikipedia.org/wiki/Electromagnetic_spectrum
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      What is electelectromagnetic radiation?
      Electromagnetic radiation thus includes the far field part of the electromagnetic field around a transmitter. A part of the "near-field" close to the transmitter, forms part of the changing electromagnetic field, but does not count as electromagnetic radiation.

      Electromagnetic radiation - Wikipedia

      en.wikipedia.org/wiki/Electromagnetic_radiation
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      What is the wavelength of an electromagnetic wave?
      The wavelengths of ultraviolet, X-ray, and gamma-ray regions of the EM spectrum are very small. Instead of using wavelengths, astronomers that study these portions of the EM spectrum usually refer to these photons by their energies, measured in electron volts (eV). Ultraviolet radiation falls in the range from a few electron volts to about 100 eV.

      Electromagnetic Spectrum - Introduction - NASA

      imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html
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      What is the range of the EM spectrum?
      Most of the radio part of the EM spectrum falls in the range from about 1 cm to 1 km, which is 30 gigahertz (GHz) to 300 kilohertz (kHz) in frequencies. The radio is a very broad part of the EM spectrum.

      Electromagnetic Spectrum - Introduction - NASA

      imagine.gsfc.nasa.gov/science/toolbox/emspectrum1.html
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