spectrum -
an ordered array of the components of an emission or wave
array an arrangement of aerials spaced to give desired directional characteristics
spectrum line an isolated component of a spectrum formed by radiation at a uniform frequency
absorption spectrum the spectrum of electromagnetic radiation that has passed through a medium that absorbed radiation of certain wavelengths
action spectrum the efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation
atomic spectrum (physics) a spectrum of radiation caused by electron transitions within an atom; the series of spectrum lines is characteristic of the element
line spectrum a spectrum in which energy is concentrated at particular wavelengths; produced by excited atoms and ions as they fall back to a lower energy level
mass spectrum a distribution of ions as shown by a mass spectrograph or a mass spectrometer
microwave spectrum the part of the electromagnetic spectrum corresponding to microwaves
radio-frequency spectrum,
radio spectrum the entire spectrum of electromagnetic frequencies used for communications; includes frequencies used for radio and radar and television
spectrum -
Of a boundedlinear 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.
Wikipedia
A spectrum (plural spectra or spectrums) 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 analogy to many fields other than optics. Thus, one might talk about the spectrum of political opinion, or the spectrum of activity of a drug, or the autism spectrum.
OmegaWiki Dictionary
Ω
spectrum A broad range of related objects or values or qualities or ideas or activities.
