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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 ...
The visible spectrum is the band of the electromagnetic spectrum that ... Evidence indicates that what Newton meant by "indigo" and "blue" does not correspond to the ...
We’ve all heard of the term "spectrum," used to describe everything from colors to mental health, but what does it mean when applied to gender and sexuality? As the world has further explored ...
A spectrum disorder is a disorder that includes a range of ... meaning one thing when referring to a schizophrenia spectrum and another when referring to bipolar or ...
A diagram of the electromagnetic spectrum, showing various properties across the range of frequencies and wavelengths. The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band.
Spectrum licenses are the lifeblood of the wireless industry. In 2008, the FCC auctioned off brand new licenses in the 700 MHz band, after kicking UHF TV stations off that band. AT&T and Verizon ...
Spectroscopy, primarily in the electromagnetic spectrum, is a fundamental exploratory tool in the fields of astronomy, chemistry, materials science, and physics, allowing the composition, physical structure and electronic structure of matter to be investigated at the atomic, molecular and macro scale, and over astronomical distances.