Metroplex

A metroplex is a contiguous metropolitan area that has more than one principal anchor city of near equal size or importance.

The term was coined to specifically describe the Dallas–Fort Worth metroplex. According to the North Texas Commission (NTC), the term originated from an ad agency's portmanteau of the terms "metropolitan" and "complex". The NTC trademarked the term "Dallas/Fort Worth Metroplex" in 1972 as a replacement for the previously-ubiquitous "North Texas".

Urban areas with smaller secondary anchor cities are not considered metroplexes, such as Mexico City, New York City, Los Angeles, Houston, Chicago, and Phoenix.

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China

Germany

Metroplex (disambiguation)

A metroplex is a contiguous metropolitan area that has more than one principal anchor city of near equal importance.

Metroplex may also refer to:

Metroplex (record label)

Metroplex is a techno record label in Detroit, founded in 1985 by techno pioneer Juan Atkins. Juan Atkins did most of his work for the label under the pseudonyms Model 500 and Infiniti, and will occasionally use such names for live acts.

Discography

Radiation

In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes:

Radiation is often categorized as either ionizing or non-ionizing depending on the energy of the radiated particles. Ionizing radiation carries more than 10 eV, which is enough to ionize atoms and molecules, and break chemical bonds. This is an important distinction due to the large difference in harmfulness to living organisms. A common source of ionizing radiation is radioactive materials that emit α, β, or γ radiation, consisting of helium nuclei, electrons or positrons, and photons, respectively. Other sources include X-rays from medical radiography examinations and muons, mesons, positrons, neutrons and other particles that constitute the secondary cosmic rays that are produced after primary cosmic rays interact with Earth's atmosphere.

Radiation (disambiguation)

Radiation is a process in which a body emits energy that propagates through a medium, or through empty space, to be absorbed by other bodies. Radiation may also refer to:

Physics

Ionizing radiation

Ionizing (or ionising in British English) radiation is radiation that carries enough energy to free electrons from atoms or molecules, thereby ionizing them. Ionizing radiation is made up of energetic subatomic particles, ions or atoms moving at high speeds (usually greater than 1% of the speed of light), and electromagnetic waves on the high-energy end of the electromagnetic spectrum.

Gamma rays, X-rays, and the higher ultraviolet part of the electromagnetic spectrum are ionizing, whereas the lower ultraviolet part of the electromagnetic spectrum, and also the lower part of the spectrum below UV, including visible light (including nearly all types of laser light), infrared, microwaves, and radio waves are all considered non-ionizing radiation. The boundary between ionizing and non-ionizing electromagnetic radiation that occurs in the ultraviolet is not sharply defined, since different molecules and atoms ionize at different energies. Conventional definition places the boundary at a photon energy between 10 eV and 33 eV in the ultraviolet (see definition boundary section below).