Definizione monolingua

spectrum

spectrum (plural spectra or spectrums)

1. Specter, apparition. [from early 17th c.]
2. A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
3. 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.

4. (chemistry) The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
5. (mathematics, linear algebra) The set of eigenvalues of a matrix.
6. (mathematics, functional analysis) Of a bounded linear operator A, the set of scalar values ? such that the operator A—?I, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.

Definizione dizionario spectrum

	spettro
	range
	range of colors
	linear algebra: set of scalar values
	A broad range of related objects or values or qualities or ideas or activities.

spettro atomico

spettro solare

Altri significati:

(chemistry) The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).

Specter, apparition. [from early 17th c.]

(mathematics, linear algebra) The set of eigenvalues of a matrix.

(mathematics, functional analysis) Of a bounded linear operator '''A''' , the set of scalar values ? such that the operator '''A—?I''' , where '''I''' denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.

chemistry: a pattern of absorption or emission of radiation

spectrum (radio, etc.)

Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc. [from later 17th c.]

A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.