# Spectrum (disambiguation)

A spectrum 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:

## Science and technology
### Physics

* Electromagnetic spectrum
** Visible spectrum or optical spectrum, a subset of the electromagnetic spectrum
** Emission spectrum, observed in light
** Absorption spectrum, observed in light
** Radio spectrum, radio frequency subset of the electromagnetic spectrum
** Stellar spectrum, the combination of continuum, absorption, and emission lines produced by a star
* Energy spectrum, of a collection of particles (particle physics)
* Frequency spectrum, of a signal
* Power spectrum, of a signal

### Medicine

* Spectrum disorder, a group of mental disorders of similar appearance or thought to share an underlying mechanism
** Autism spectrum, encompassing autism, Asperger's, etc.
* Antimicrobial spectrum, the range of microorganisms an antibiotic can kill or inhibit

### Mathematics

In mathematics, spectrum frequently denotes a set of numbers associated to an object:
* Spectrum of a matrix, its set of eigenvalues, in linear algebra
** Spectrum (functional analysis), a generalization of the concept of matrix eigenvalues to operators
** Spectrum of a graph, studied in spectral graph theory
** Pseudospectrum
* Spectrum of a polygon, the set of numbers of possible equidissections
* Spectrum of a sentence, in mathematical logic
* Spectrum of a theory, in mathematical logic
There are also several other, unrelated meanings:
* Spectrum (topology), the fundamental object of study in stable homotopy theory
* Spectrum of a C*-algebra, a kind of dual object
* Spectrum of a ring, the set of its prime ideals, in commutative algebra

## Arts and entertainment

* Spectrum (brand), a brand name used by Charter Communications for their telecommunication services, including:
** Spectrum News, a group of six cable news channels
** Spectrum Sports, a group of nine regional sports networks in the US
** Spectrum TV Stream, a streaming service

### Publications

* IEEE Spectrum, a magazine by the Institute of Electrical and Electronics Engineers
* Spectrum (magazine), an independent Seventh-day Adventist magazine
* Spectrum (newspaper), a defunct Toledo, Ohio weekly newspaper
* Spectrum, a news website published by the Simons Foundation Autism Research Initiative
* The Spectrum (Utah), also known as The Spectrum & Daily News, a Gannett newspaper in St. George, Utah
* Spectrum (novel), a 2002 novel by Russian author Sergey Lukyanenko
* Spectrum, a magazine published with Scotland on Sunday
* Spectrum, a liftout in The Sydney Morning Herald

#### Student newspapers

* The Spectrum (USLS), the student newspaper of the University of St. La Salle in the Philippines
* The Spectrum (NDSU), the student newspaper of the North Dakota State University in the United States
* The Spectrum (University at Buffalo), the student newspaper of the State University of New York at Buffalo

### Television

* Spectrum (TV channel), a defunct Chicago-area pay television broadcaster founded by United Cable
* Spectrum (TV series), a 1958 Canadian television series
* Spectrum (radio program), a daily broadcast series on CBS Radio, c. 1970–1992

### Music

* The Spectrum (Sirius XM), a music channel on Sirius Satellite Radio

#### Groups

* Spectrum (band), an Australian group of the 1970s led by Mike Rudd
* Spectrum (group), a South Korean boy group formed in 2018
* Spectrum, a British band led by Peter Kember
* Spectrum, a bluegrass band that included Béla Fleck and Jimmy Gaudreau
* Spectrum (The Carpenters), 1960s jazz band led by Richard and Karen Carpenter
* The Spectrum (1964–1970), a London-based pop group coincidentally providing the closing theme for the spectrum-themed TV show Captain Scarlet and the Mysterons

#### Albums

* Spectrum (Billy Cobham album), debut album of fusion drummer Billy Cobham
* Spectrum (Cedar Walton album), the second album by jazz pianist Cedar Walton
* Spectrum (Heals album), debut album of Indonesian band Heals
* Spectrum (Jega album), debut album of electronic musician Jega
* Spectrum (Steve Howe album), 2005
* Spectrum (Illinois Jacquet album), 1965
* Spectrum (Westlife album), 2019
* The Spectrum (album), of 2017 by Daley
* Spectrum (Hiromi album), 2019
* Spectrum, by iamjakehill, 2017

#### Songs

* "Spectrum (Say My Name)", a 2012 song by British indie rock band Florence and the Machine
* "Spectrum" (Zedd song), a 2012 song by German electronic dance music producer Zedd; also covered by SM The Performance
* "Spectrum", a 2017 song by musical artist Muzz

### Other arts and entertainment

* Spectrum, a news website founded by the Simons Foundation Autism Research Initiative
* Spectrum, an Irish radio program hosted by Melanie Verwoerd in 2005
* Monica Rambeau, a Marvel Comics character who uses the name Spectrum
* Spectrum, the worldwide security organisation in the 1960s TV series Captain Scarlet and the Mysterons
* Gaylactic Spectrum Awards or Spectrums, a literary award
* Spectrum Award, in fantasy, science fiction, and horror artwork

## Buildings and structures

* Spectrum (Montreal), a defunct concert venue in Canada
* Spectrum London, an art gallery in England
* Guildford Spectrum, a leisure complex in Guildford, England
* Smith Spectrum, a sports arena in Logan, Utah, US
* Spectrum (arena), a former arena in Philadelphia, Pennsylvania, US
* Spectrum Stadium, near Orlando, Florida, US
* Northlands Spectrum, later known as Northlands Park, a horse racing track in Edmonton, Alberta, Canada

## Organizations

* Spectrum Aircraft, a Canadian ultralight aircraft manufacturer
* Spectrum Aeronautical, a US-based manufacturer of very light jets
* Spectrum Animation, a defunct Japanese animation studio
* Spectrum Brands, an American home-essentials company
* Het Spectrum, a Dutch publishing company
* Spectrum Pharmaceuticals, an American biopharmaceutical company
* Spectrum (Amsterdam) (formerly Librije's Zusje), Michelin-starred restaurant in Amsterdam, the Netherlands

## Products

* Spectrum (racing car), a series of Australian open wheel racing cars manufactured by Borland Racing Developments
* Geo Spectrum or Chevrolet Spectrum, a sedan and hatchback marketed in North America
* ZX Spectrum, an early British home computer by Sinclair
* Isar Aerospace Spectrum, a two-stage orbital launch vehicle
* Spectrum, a brand of printer paper owned by Georgia-Pacific

## Other uses

* Economic spectrum, disparities between social classes
* Political spectrum, of opinion
* Spectrum Range, a mountain range in British Columbia, Canada
* Spectrum (horse), a thoroughbred racehorse
* SPECTRUM Standard, a Museum Collections Management Standard developed by the Collections Trust