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spectrum
spectrum
spectrum 1. A range of electromagnetic energies arranged in order of wavelength or frequency (see
electromagnetic spectrum). The
emission spectrum of a body or substance is the range of radiations it emits when it is heated, is bombarded by electrons or ions, or absorbs photons. The
absorption spectrum of a substance consists of dark lines or bands in a continuous spectrum, each line being a wavelength or group of wavelengths at which light is removed from the continuous spectrum by the absorbing medium. These lines and bands are at the same wavelengths as some of the lines and bands in the substance's emission spectrum. Emission and absorption spectra may show a
continuous spectrum (also called a
continuum), a
line spectrum, or a
band spectrum. A continuous spectrum contains an unbroken sequence of frequencies over a wide range; continuous spectra are produced by incandescent solids, liquids, and compressed gases. Line spectra are discontinuous lines produced by excited atoms and ions as they fall back to a lower energy level. Band spectra (closely grouped bands of lines) are characteristic of molecular gases or chemical compounds.
2. The coloured band produced when visible light is passed through a spectroscope. See also
spectroscopy.
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Spectra Logic's new 4mm DDS-3 automated tape library doubles data transfer and triples capacity.
Business Wire; 4/8/1997; 700+ words
; ...BUSINESS WIRE)--April 8, 1997--Today Spectra Logic announced the release of the Spectra 5000 family of automated tape libraries. Based on new 4mm DDS-3 tape drives, the Spectra 5000 delivers double the data transfer rate...
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Spectra Boosts Online Mutual Fund System Performance Quadrupling Throughput, Capacity.
Business Wire; 6/20/2002; 700+ words
; ...TORONTO--(BUSINESS WIRE)--June 20, 2002 Spectra Securities Software Inc. ("Spectra"), a leading provider of wealth management...solutions, today announced a performance release of Spectra Funds. The new release of Spectra's automated...
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Spectrum Bridge Announces SpecEx(TM), the World's First Online Marketplace for Wireless Spectrum.
Business Wire; 9/8/2008; 700+ words
; ...More Profitable to Buy, Sell and Lease Licensed Spectrum LAKE MARY, Fla. -- Spectrum Bridge, Inc. today announced the launch of SpecEx[TM], the online marketplace for spectrum[TM]. SpecEx will make it simpler and more...
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Spectra Logic Launches New Online University Program for Channel Partners.
Newspaper article from: Information Technology Newsweekly; 6/9/2009; 700+ words
; Spectra Logic's channel partners can now attend Spectra University on the Web to pursue sales and technical certification...training from an office, home or anywhere else in the world. Spectra Logic continues to invest in its commitment to channel programs...
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Spectra Logic Introduces T-Series Library for SMEs; Spectra Logic Designs Feature-Rich, Scalable Library for Small to Medium Enterprises.
Business Wire; 3/14/2005; 700+ words
; ...affordably, and with a sophisticated feature set. In response, Spectra Logic created a robust SME solution leveraging its proven T Series software. Spectra is now shipping the Spectra(R) T50 -- a fast, small library with true enterprise features...
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Spectra Logic Announces New Vice President of Sales.
PR Newswire; 7/16/2002; 700+ words
; BOULDER, Colo. -- Spectra Logic, the industry's leading manufacturer...of sales and management experience to Spectra Logic. "John's well-balanced background...process perspectives needed to support Spectra Logic's market growth," said Nathan...
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Spectra-Physics' subsidiary changes name to Spectra Technology.
PR Newswire; 12/20/1984; 648 words
; ...Math Sciences brings to Spectra-Physics unique insights into...the future," said Rose. "Spectra-Physics, in turn, provides...opportunities to participate in a broad spectrum of current commercial laser...affiliation." Under its new name, Spectra Technology will continue to...
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Spectra Logic Announces Latest Government Reseller Agreement With Northrop Grumman Information Technology; Spectra Logic Increases Presence in Government Market.
PR Newswire; 3/25/2002; 700+ words
; BOULDER, Colo. -- Spectra Logic, the industry's leading manufacturer...infrastructure solutions to the federal market. Spectra Logic's sharable, high density tape...for mission critical information. "Spectra Logic tape libraries complement our...
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Spectra Logic Receives Brocade Fabric Aware Status for End-to-End Storage Networking Interoperability.
Business Wire; 11/2/2004; 700+ words
; BOULDER, Colo. -- Spectra Logic Demonstrates Interoperability in Heterogeneous Brocade-Based Storage Area Network Environments Spectra Logic announced today that its Spectra(R) T950 and T120 tape libraries have been verified...
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Spectra SX: A sensible alternative to the hybrid.(Auto Weekly)
Newspaper article from: The Virginian Pilot; 8/19/2005; 700+ words
; ...miles from the tank. That was in the Kia Spectra SX compact sedan, one of a series of...substantially less expensive, such as the sporty Spectra SX, which did a commendable job of transporting...unleaded gasoline - exactly half of the Spectra SX's tank, which was filled at a Virginia...
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Spectrum Organic Products, Inc.
Book article from: International Directory of Company Histories
Spectrum Organic Products, Inc. 5341 Old Redwood...Public Company Incorporated: 1980 as Spectrum Naturals, Inc. Employees: 59 Sales...Vegetable Canning; 311422 Specialty Canning Spectrum Organic Products, Inc., comprises three...
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spectrum
Book article from: The Columbia Encyclopedia, Sixth Edition
...of particles into a spectrum according to their...Continuous and Line Spectra Dispersion, the separation...visible light into a spectrum, may be accomplished...known as a continuous spectrum. Continuous spectra are produced by all...
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Electromagnetic Spectrum
Book article from: World of Earth Science
Electromagnetic spectrum The electromagnetic spectrum encompasses a continuous range of frequencies or wavelengths...frequency, high-energy gamma rays. The electromagnetic spectrum is traditionally divided into regions of radio waves, microwaves...
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Spectrum Control, Inc.
Book article from: International Directory of Company Histories
Spectrum Control, Inc. 8031 Avonia Road Fairview...Manufacturing Based near Erie, Pennsylvania, Spectrum Control, Inc. designs and manufactures...frequency, or microwave interference. Spectrum's business is organized into three groups...
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National Telecommunications Information Administration, and Security for the Radio Frequency Spectrum, United States
Encyclopedia entry from: Encyclopedia of Espionage, Intelligence, and Security
...and Security for the Radio Frequency Spectrum, United States The Federal Communications...participants in the increasingly crowded radio spectrum, including the private sector, the...to meet commercial needs for the radio spectrum while maintaining availability for defense...
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