Definitions for Spectrumˈspɛk trəm
This page provides all possible meanings and translations of the word Spectrum
an ordered array of the components of an emission or wave
a broad range of related objects or values or qualities or ideas or activities
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.
The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
The set of eigenvalues of a matrix.
Of a bounded linear operator A, the set of scalar values u03BB such that the operator Au2014u03BBI, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.
Origin: From spectrum, from specio. (see scope)
an apparition; a specter
the several colored and other rays of which light is composed, separated by the refraction of a prism or other means, and observed or studied either as spread out on a screen, by direct vision, by photography, or otherwise. See Illust. of Light, and Spectroscope
a luminous appearance, or an image seen after the eye has been exposed to an intense light or a strongly illuminated object. When the object is colored, the image appears of the complementary color, as a green image seen after viewing a red wafer lying on white paper. Called also ocular spectrum
Origin: [L. See Specter.]
A spectrum 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. In these uses, values within a spectrum may not be associated with precisely quantifiable numbers or definitions. Such uses imply a broad range of conditions or behaviors grouped together and studied under a single title for ease of discussion. In most modern usages of spectrum there is a unifying theme between extremes at either end. Some older usages of the word did not have a unifying theme, but they led to modern ones through a sequence of events set out below. Modern usages in mathematics did evolve from a unifying theme, but this may be difficult to recognize.
The Nuttall Encyclopedia
the name given to coloured and other rays of pure light separated by refraction in its transmission through a prism, as exhibited on a screen in a darkened chamber.
British National Corpus
Rank popularity for the word 'Spectrum' in Nouns Frequency: #1872
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