Spectral
101Spectral energy distribution — A spectral energy distribution (SED) is a plot of flux, brightness, or flux density versus frequency or wavelength of light. It is used in many branches of astronomy to characterize astronomical sources. For example, in radio astronomy, an SED… …
102Spectral gap — In mathematics, the spectral gap is the difference between the two largest eigenvalues of a matrix or operator; alternately, it is sometimes taken as the smallest non zero eigenvalue. Various theorems relate this difference to other properties of …
103Spectral edge frequency — The spectral edge frequency or SEF is a measure used in signal processing. It is usually expressed as SEF x , which stands for the frequency below which x percent of the total power of a given signal are located. (typically x is in the range 75… …
104spectral type — Astron. a category for classifying a star, as A star or G star, according to features of its spectrum, as its shape as a function of temperature and wavelength and its absorption spectrum, that indicate the surface temperature of the star and the …
105spectral line series — ▪ physics any of the related sequences of wavelengths characterizing the light and other electromagnetic radiation emitted by energized atoms. The simplest of these series are produced by hydrogen. When resolved by a spectroscope, the… …
106spectral characteristic — spektrinė charakteristika statusas T sritis automatika atitikmenys: angl. spectral characteristic; spectral response characteristic vok. Spektralcharakteristik, f; spektrale Charakteristik, f rus. спектральная характеристика, f pranc.… …
107spectral response characteristic — spektrinė charakteristika statusas T sritis automatika atitikmenys: angl. spectral characteristic; spectral response characteristic vok. Spektralcharakteristik, f; spektrale Charakteristik, f rus. спектральная характеристика, f pranc.… …
108spectral responsivity — spektrinis jautris statusas T sritis automatika atitikmenys: angl. spectral responsivity; spectral sensitivity vok. Spektralempfindlichkeit, f rus. спектральная чувствительность, f pranc. sensibilité spectrale, f …
109spectral sensitivity — spektrinis jautris statusas T sritis automatika atitikmenys: angl. spectral responsivity; spectral sensitivity vok. Spektralempfindlichkeit, f rus. спектральная чувствительность, f pranc. sensibilité spectrale, f …
110spectral filter — spektrinis filtras statusas T sritis automatika atitikmenys: angl. spectral filter; spectrum filter vok. Spektralfilter, n rus. спектральный фильтр, m pranc. filtre spectral, m …
