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The spectrum in a rainbow. A spectrum (pl.: spectra or spectrums) [1] is a condition that is not limited to a specific set of values but can vary, without gaps, across a continuum. The word spectrum was first used scientifically in optics to describe the rainbow of colors in visible light after passing through a prism.
In Latin, spectrum means "image" or "apparition", including the meaning "spectre". Spectral evidence is testimony about what was done by spectres of persons not present physically, or hearsay evidence about what ghosts or apparitions of Satan said. It was used to convict a number of persons of witchcraft at Salem, Massachusetts in the late 17th ...
Goethe argued that the continuous spectrum was a compound phenomenon. Where Newton narrowed the beam of light to isolate the phenomenon, Goethe observed that a wider aperture produces not a spectrum but rather reddish-yellow and blue-cyan edges with white between them. The spectrum appears only when these edges are close enough to overlap.
In mathematics, spectrum frequently denotes a set of numbers associated to an object: Spectrum of a matrix, its set of eigenvalues, in linear algebra . Spectrum (functional analysis), a generalization of the concept of matrix eigenvalues to operators
A political spectrum is a system to characterize and classify different ... Liberalism can mean different things in ... Text is available under the Creative ...
There are far too many text abbreviations to know, so we've gathered the most popular ones to make your ultimate guide! Skip to main content. Sign in. Mail. 24/7 Help. For premium support please ...
The spectrum of is the set of all ... Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply. By using this site, ...
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