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Spectrum (other)
A spectrum is a condition or value that is not limited to a specific set of values but can vary infinitely within a continuum. Spectrum may also refer to: Science and technology Physics * Continuous spectrum, of any physical quantity that can change smoothly * Discrete spectrum * Electromagnetic spectrum ** Visible spectrum or optical spectrum, a subset of the electromagnetic spectrum ** Emission spectrum, observed in light ** Absorption spectrum, observed in light ** Radio spectrum, radio frequency subset of the electromagnetic spectrum ** Stellar spectrum, the combination of continuum, absorption, and emission lines produced by a star * Energy spectrum, of a collection of particles (particle physics) * Frequency spectrum, of a signal * Power spectrum, of a signal Medicine * Spectrum disorder, a group of mental disorders of similar appearance or thought to share an underlying mechanism ** Autism spectrum, encompassing autism, Asperger's, etc. * Antimicrobial spectrum, the range ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spectrum
A spectrum (plural ''spectra'' or ''spectrums'') is a condition that is not limited to a specific set of values but can vary, without gaps, across a continuum. The word was first used scientifically in optics to describe the rainbow of colors in visible light after passing through a prism. As scientific understanding of light advanced, it came to apply to the entire electromagnetic spectrum. It thereby became a mapping of a range of magnitudes (wavelengths) to a range of qualities, which are the perceived "colors of the rainbow" and other properties which correspond to wavelengths that lie outside of the visible light spectrum. Spectrum has since been applied by analogy to topics outside 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 condition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
