spectrum

Pronunciation Noun

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Pronunciation Noun

**spectrum** (*plural* spectra)

- A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
- Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc. [
*from later 17th c.*]**2010**October 30, Jim Giles,*Jammed!*, in*New Scientist*,- Current 3G technologies can send roughly 1 bit of data - a one or a zero - per second over each 1 Hz of
**spectrum**that the operator owns.

- Current 3G technologies can send roughly 1 bit of data - a one or a zero - per second over each 1 Hz of

- (
*psychology, education*) The autism spectrum. - (
*chemistry*) The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.). - (
*mathematics, linear algebra*) The set of eigenvalues of a matrix. - (
*mathematics, functional analysis*) Of a bounded linear operator*A*, the set of scalar values λ such that the operator*A—λI*, where*I*denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense. - (
*abstract algebra, algebraic geometry*) The set, denoted Spec(*R*), of all prime ideals of a given ring*R*, commonly augmented with a Zariski topology and considered as a topological space.*hyponyms*en

- (
*obsolete*) Specter, apparition. [*from early 17th c.*] - The image of something seen that persists after the eyes are closed.

- French: spectre
- German: Spektrum
- Italian: spettro
- Portuguese: espectro, espetro
- Russian: спектр
- Spanish: espectro

This text is extracted from the Wiktionary and it is available under the CC BY-SA 3.0 license | Terms and conditions | Privacy policy 0.006