# Hertz (unit)/Related Articles

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*See also changes related to Hertz (unit), or pages that link to Hertz (unit) or to this page or whose text contains "Hertz (unit)".*

## Parent topics

- Unit (measurement) [r]: A basic quantity, multiples or parts of which are used to express other measured quantities.
^{[e]} - International System of Units [r]: Metric unit system based on the metre, kilogram, second, ampere, kelvin, mole and candela.
^{[e]} - Electromagnetism [r]: Phenomena and theories regarding electricity and magnetism.
^{[e]} - Electromagnetic radiation [r]: a collection of electromagnetic waves, usually of different wavelengths.
^{[e]} - Electromagnetic spectrum [r]: The range of electromagnetic waves covering all frequencies and wavelengths.
^{[e]} - Electromagnetic wave [r]: A change, periodic in space and time, of an electric field
**E**(**r**,t) and a magnetic field**B**(**r**,t); a stream of electromagnetic waves, referred to as electromagnetic radiation, can be seen as a stream of massless elementary particles, named photons.^{[e]} - Frequency [r]: For a periodic (i.e., repeating) phenomena, the number of repetitions per unit of time, usually one second; measured in Hertz
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## Subtopics

- Acoustic energy [r]: Energy propagated as pressure waves, through elastic media such as air or water. Hearing is the detection of acoustic energy within the frequency range of the animal detecting the energy
^{[e]} - Bandwidth (computers) [r]: The maximum amount of data that can moved through a connection.
^{[e]} - Bandwidth [r]: In engineering, the length between two cut-off frequencies, as measured in hertz.
^{[e]} - Frequency modulation [r]: Technique for imposing information onto a electromagnetic signal of constant frequency -- the "carrier wave".
^{[e]} - Light [r]: The part of the electromagnetic spectrum visible to a species' biological eye.
^{[e]} - Pitch (music) [r]: Perceived frequency of a sound or musical tone.
^{[e]} - Planck's constant [r]: The constant of proportionality relating the energy of a photon to the frequency of that photon, named sfter Max Karl Ernst Ludwig Planck.
^{[e]} - Second [r]:
*Please do not use this term in your topic list, because there is no single article for it. Please substitute a more precise term. See Second (disambiguation) for a list of available, more precise, topics. Please add a new usage if needed.* - Speed of light [r]: A physical constant
*c*describing the speed of electromagnetic radiation in vacuum. In the International System of Units the metre is the distance light travels in classical vacuum in 1/*c*seconds, using the defined value*c = c*≡ 299 792 458 m/s (exact)._{0}^{[e]} - Wavelength [r]: For a repeating phenomenon such as a radio signal with a given frequency, the wavelength is the length, in meters, of a single repetition
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