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  2. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    A diagram of the electromagnetic spectrum, showing various properties across the range of frequencies and wavelengths. The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band.

  3. High frequency - Wikipedia

    en.wikipedia.org/wiki/High_frequency

    HF's position in the electromagnetic spectrum.. High frequency (HF) is the ITU designation [1] [2] for the band of radio waves with frequency between 3 and 30 megahertz (MHz). It is also known as the decameter band or decameter wave as its wavelengths range from one to ten decameters (ten to one hundred meters).

  4. Radio spectrum - Wikipedia

    en.wikipedia.org/wiki/Radio_spectrum

    The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3,000 GHz (3 THz). Electromagnetic waves in this frequency range, called radio waves , are widely used in modern technology, particularly in telecommunication .

  5. Electromagnetic radiation - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_radiation

    Electromagnetic radiation is commonly referred to as "light", EM, EMR, or electromagnetic waves. [2] The position of an electromagnetic wave within the electromagnetic spectrum can be characterized by either its frequency of oscillation or its wavelength. Electromagnetic waves of different frequency are called by different names since they have ...

  6. Introduction to electromagnetism - Wikipedia

    en.wikipedia.org/wiki/Introduction_to...

    The existence of electromagnetic radiation was proved by Heinrich Hertz in a series of experiments ranging from 1886 to 1889 in which he discovered the existence of radio waves. The full electromagnetic spectrum (in order of increasing frequency) consists of radio waves, microwaves , infrared radiation , visible light , ultraviolet light , X ...

  7. Halloween Cat Bowling Coughs Up Mental Candy - AOL

    www.aol.com/news/2009-10-06-halloween-cat...

    Cat Bowling, which first kicked off in 2001, just opened the doors to. ... Halloween Cat Bowling Coughs Up Mental Candy. Micheal Mullen. Updated August 10, 2016 at 3:58 PM.

  8. 100+ Halloween Cat Names to Give Kitties in Spooky Season - AOL

    www.aol.com/100-halloween-cat-names-kitties...

    Halloween Girl Cat Names Halloween is the perfect season for celebrating female horror icons and the wild, witchy women of yore. These ghoulish girl cat names , inspired by some of our favorite ...

  9. Visible spectrum - Wikipedia

    en.wikipedia.org/wiki/Visible_spectrum

    Visible wavelengths pass largely unattenuated through the Earth's atmosphere via the "optical window" region of the electromagnetic spectrum. An example of this phenomenon is when clean air scatters blue light more than red light, and so the midday sky appears blue (apart from the area around the Sun which appears white because the light is not ...