Spectrum (disambiguation) - AbsoluteAstronomy.com

A spectrum
Spectrum
A spectrum is a condition that is not limited to a specific set of values but can vary infinitely within a continuum. The word saw its first scientific use within the field of optics to describe the rainbow of colors in visible light when separated using a prism; it has since been applied by...

is a condition or value that is not limited to a specific set of values but can vary infinitely within a continuum.

Spectrum may also refer to:

Physical science

Electromagnetic spectrum
Electromagnetic spectrum
The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object....
- Visible spectrum
  Visible spectrum
  The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths from about 390 to 750 nm. In terms of...
  
  or optical spectrum, a subset of the electromagnetic spectrum
- Emission spectrum
  Emission spectrum
  The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted by the element's atoms or the compound's molecules when they are returned to a lower energy state....
  
  observed in light
- Absorption spectrum observed in light
- Spectral class of stars in Stellar classification
  Stellar classification
  In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...
- Spectral class of asteroids
- Spectral power distribution
  Spectral power distribution
  In color science and radiometry, a spectral power distribution describes the power per unit area per unit wavelength of an illumination , or more generally, the per-wavelength contribution to any radiometric quantity .Mathematically, for the spectral...
  
  of an illuminant
Energy spectrum of a collection of particles (particle physics)
Frequency spectrum
Frequency spectrum
The frequency spectrum of a time-domain signal is a representation of that signal in the frequency domain. The frequency spectrum can be generated via a Fourier transform of the signal, and the resulting values are usually presented as amplitude and phase, both plotted versus frequency.Any signal...

of a signal
Power spectrum of a signal
Harmonic series (music)
Harmonic series (music)
Pitched musical instruments are often based on an approximate harmonic oscillator such as a string or a column of air, which oscillates at numerous frequencies simultaneously. At these resonant frequencies, waves travel in both directions along the string or air column, reinforcing and canceling...

(spectrum of sound energy) of a musical note

Social sciences

Economic spectrum, disparities between social classes
Political spectrum
Political spectrum
A political spectrum is a way of modeling different political positions by placing them upon one or more geometric axes symbolizing independent political dimensions....

of opinion
Spectrum disorder
Spectrum disorder
A spectrum in psychiatry is a range of linked conditions, such that there is "not a unitary disorder but rather a syndrome composed of subgroups". The subgroups may be linked together by clinical appearance or by shared underlying causation...

, in psychiatry

Mathematics

Spectrum of a matrix
Spectrum of a matrix
In mathematics, the spectrum of a matrix is the set of its eigenvalues. This notion can be extended to the spectrum of an operator in the infinite-dimensional case.The determinant equals the product of the eigenvalues...

, in linear algebra
Spectrum (functional analysis)
Spectrum (functional analysis)
In functional analysis, the concept of the spectrum of a bounded operator is a generalisation of the concept of eigenvalues for matrices. Specifically, a complex number λ is said to be in the spectrum of a bounded linear operator T if λI − T is not invertible, where I is the...

, a generalization of the concept of matrix eigenvalues to operators
Spectrum (homotopy theory)
Spectrum (homotopy theory)
In algebraic topology, a branch of mathematics, a spectrum is an object representing a generalized cohomology theory. There are several different constructions of categories of spectra, any of which gives a context for the same stable homotopy theory....
Spectrum of a graph, studied in spectral graph theory
Spectral graph theory
In mathematics, spectral graph theory is the study of properties of a graph in relationship to the characteristic polynomial, eigenvalues, and eigenvectors of matrices associated to the graph, such as its adjacency matrix or Laplacian matrix....
Spectrum of a ring
Spectrum of a ring
In abstract algebra and algebraic geometry, the spectrum of a commutative ring R, denoted by Spec, is the set of all proper prime ideals of R...

, in commutative algebra
Spectrum of a C*-algebra
Spectrum of a theory
Spectrum of a theory
In model theory, a branch of mathematical logic, the spectrum of a theoryis given by the number of isomorphism classes of models in various cardinalities. More precisely,...

, in mathematical logic
Stone space of boolean algebra

Media

IEEE Spectrum
IEEE Spectrum
IEEE Spectrum is a magazine edited by the Institute of Electrical and Electronics Engineers. The IEEE's description of it is:IEEE Spectrum began publishing in January 1964 as a successor to Electrical Engineering...

, a magazine
Spectrum (magazine)
Spectrum (magazine)
Spectrum is the official publication of Adventist Forums, published four times a year. It was established "to encourage Seventh-day Adventist participation in the discussion of contemporary issues from a Christian viewpoint, to look without prejudice at all sides of a subject, to evaluate the...

, an independent Seventh-day Adventist magazine
Spectrum (TV channel)
Spectrum (TV channel)
Spectrum was a subscription TV channel in the Chicago area that existed in the early 1980s. It was a direct competitor to ON-TV and operated in the same way. It was owned and operated by United Cable.-Usage:...

, a defunct Chicago-area pay television broadcaster founded by United Cable
Spectrum (newspaper)
Spectrum (newspaper)
Spectrum was a Toledo, Ohio-based newspaper serving the University of Toledo community.- History :Spectrum was founded in 1993 by two University of Toledo students, Michael Miller and Will Nicholes...

, a defunct Toledo, Ohio weekly newspaper
Spectrum (1958 TV series)
Spectrum (1958 TV series)
Spectrum is a Canadian drama anthology television miniseries which aired on CBC Television in 1958.-Scheduling:This half-hour series was broadcast Thursdays at 10:00 p.m. from 5 June to 31 July 1958.-Episodes:...

, a Canadian television series
Spectrum (Russian novel)
Spectrum (Russian novel)
Spectrum is a novel that takes place in the near future. Contact with aliens allowed humanity to travel between planets through portals. The Keymaster civilization not only provides new technologies to the world but also makes sure that their conditions are fulfilled to the letter: unrestricted...

, a novel by Russian author Sergey Lukyanenko
Spectrum liftout in The Sydney Morning Herald
The Sydney Morning Herald
The Sydney Morning Herald is a daily broadsheet newspaper published by Fairfax Media in Sydney, Australia. Founded in 1831 as the Sydney Herald, the SMH is the oldest continuously published newspaper in Australia. The newspaper is published six days a week. The newspaper's Sunday counterpart, The...
The Spectrum, the local daily newspaper in St. George, Utah
St. George, Utah
St. George is a city located in the southwestern part of the U.S. state of Utah, and the county seat of Washington County, Utah. It is the principal city of and is included in the St. George, Utah, Metropolitan Statistical Area. The city is 119 miles northeast of Las Vegas, Nevada, and 303 miles ...

Student newspapers

The Spectrum (USLS)
The Spectrum (USLS)
The Spectrum is one of the oldest student publications in the Philippines; its history dates back to 1956. Its monthly newspaper, bimonthly magazine, and annual literary folio Scribe are published by the students of the University of St. La Salle in Bacolod City.-Early years:In the school year...

, the student newspaper of the University of St. La Salle in the Philippines
NDSU Spectrum
NDSU Spectrum
The Spectrum is the student-run newspaper of North Dakota State University in Fargo, North Dakota. The Spectrum has been in publication since 1896....

, the student newspaper of the North Dakota State University
The Spectrum (newspaper), the student newspaper of the University at Buffalo

Music

Peter Kember
Peter Kember
Peter Kember is a British musician and producer, more usually known as Sonic Boom, and was a founding member of alternative rock band Spacemen 3....

's band
Spectral (album)
Spectral (album)
Spectral is the third full-length studio album by the Swedish melodic death metal band Skyfire. It was released on May 10, 2004 through Arise Records. The lyrical themes include armageddon, loneliness, delusion, despair and mysticism...

, album by metal band Skyfire
Spectrum (band)
Spectrum (band)
Spectrum is an Australian progressive rock band that formed in Melbourne in 1969 and, in its original period, remained in existence until 1973. Its members also performed under the alter-ego Indelible Murtceps...

, an Australian group of the 1970s led by Mike Rudd
Spectrum (Billy Cobham album), debut album of fusion drummer Billy Cobham
Spectrum (Jega album)
Spectrum (Jega album)
-External links:* at the Planet Mu website...

, debut album of electronic musician Jega
The Spectrum (Sirius)
The Spectrum (Sirius)
The Spectrum is an adult album alternative radio station on Sirius Satellite Radio channel 28 , XM Satellite Radio channel 28 and on Dish Network channel 6018. Until February 9, 2010, it was on DirecTV channel 832. It is operated by Sirius XM Radio...

, a music channel on Sirius Satellite Radio

Buildings and structures

Spectrum (Montreal)
Spectrum (Montreal)
The Spectrum was a concert hall, in Montreal, Quebec, Canada, that closed on August 5, 2007. Opened on October 17, 1982, as the Alouette Theatre, it was briefly renamed Club Montreal before receiving its popular name.The Spectrum had a capacity of about 1200 and had a "cabaret" setup with table...

, a defunct concert venue and local landmark
Spectrum London
Spectrum London
Spectrum London was a London art gallery which showed contemporary figurative painting, photography and sculpture. It staged Go West, the first commercial West End show of the Stuckists, and a retrospective by Sebastian Horsley...

, UK, an art gallery
Guildford Spectrum
Guildford Spectrum
Guildford Spectrum is a leisure complex in Guildford, Surrey, England. Owned by Guildford Borough Council, it was opened on 28 February 1993 at a cost of £28 million. It is the home of ice hockey team the Guildford Flames, and other sports clubs...

, a leisure complex in Guildford, England
Smith Spectrum
Smith Spectrum
The Dee Glen Smith Spectrum is a 10,270-seat multi-purpose arena on the campus of Utah State University in Logan, Utah. It is best known for being the home of the Utah State Aggies men's basketball team...

, a sports arena in Logan, Utah, U.S.A.
Spectrum (arena), a closed sports arena in Philadelphia, Pennsylvania, U.S.A.

Other

Spectrum Aircraft
Spectrum Aircraft
Spectrum Aircraft was a Canadian ultralight aircraft manufacturer that commenced operations in 1983 and went out of business in 1992. The company was known for its Beaver ultralight design, which remains in production by successor companies in the 21st century....

, a Canadian ultralight aircraft manufacturer
Spectrum Aeronautical
Spectrum Aeronautical
Spectrum Aeronautical is headquartered in Carlsbad, California with its development center located in Spanish Fork, Utah.- Management :Spectrum management’s history of technologically sophisticated advanced composite aircraft programs includes MQ-1 Predator, LearAvia Lear Fan, Beechcraft Starship,...

, a US based manufactuer of very light jets
Spectrum (racing car), a series of Australian open wheel racing cars manufactured by Borland Racing Developments
Chevy Spectrum, a North American car also sold as the Geo Spectrum
Spectrum Range
Spectrum Range
The Spectrum Range, formerly called the Spectrum Mountains and the Rainbow Mountains, is a subrange of the Tahltan Highland in the Stikine Country of northwestern British Columbia, 20 km west of the Stewart-Cassiar Highway, south of Mount Edziza and north of the Arctic Lake Plateau. The...

, a mountain range in British Columbia, Canada
Gaylactic Spectrum Awards
Gaylactic Spectrum Awards
The Gaylactic Spectrum Awards are given to works of science fiction, fantasy and horror that explore LGBT topics in a positive way. Established in 1998, the awards were initially presented by the Gaylactic Network, with awards first awarded in 1999. In 2002 the awards were given their own...

or Spectrums, a literary award
Het Spectrum
Het Spectrum
Het Spectrum is a Dutch publishing house.It publishes books, under its own name and two other trade marks: Winkler Prins and Prisma. Since September 1999 Het Spectrum is a business unit within PCM Algemene Boeken....

, a Dutch publishing company
Sinclair ZX Spectrum, an early British home computer
Spectrum, the worldwide security organisation in the 1960s TV show Captain Scarlet
Captain Scarlet and the Mysterons
Captain Scarlet and the Mysterons, often referred to as Captain Scarlet, is a 1960s British science-fiction television series produced by the Century 21 Productions company of Gerry and Sylvia Anderson, John Read and Reg Hill...
Spectrum, a brand of printer paper owned by Georgia-Pacific
Georgia-Pacific
Georgia-Pacific LLC is an American pulp and paper company based in Atlanta, Georgia, and is one of the world's leading manufacturers and distributors of tissue, pulp, paper, packaging, building products and related chemicals. As of Fall 2010, the company employed more than 40,000 people at more...