Spectroscopy
hideSpectroscopy was originally the study of the interaction between radiation and matter as a function of wavelength (λ). In fact, historically, spectroscopy referred to the use of visible light dispersed according to its wavelength, e.g. by a prism. Later the concept was expanded greatly to comprise any measurement of a quantity as function of either wavelength or frequency. Thus it also can refer to a response to an alternating field or varying frequency (ν). A further extension of the scope of the definition added energy (E) as a variable, once the very close relationship E = hν for photons was realized (h is the Planck constant). A plot of the response as a function of wavelength—or more commonly frequency—is referred to as a spectrum; see also spectral linewidth.
Spectrometry is the spectroscopic technique used to assess the concentration or amount of a given species. In those cases, the instrument that performs such measurements is a spectrometer or spectrograph.
Spectroscopy/spectrometry is often used in physical and analytical chemistry for the identification of substances through the spectrum emitted from or absorbed by them.
Spectroscopy/spectrometry is also heavily used in astronomy and remote sensing. Most large telescopes have spectrometers, which are used either to measure the chemical composition and physical properties of astronomical objects or to measure their velocities from the Doppler shift of their spectral lines.
For more information about Spectroscopy, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with spectroscopy
Fat collections linked to decreased heart function
23 hours ago |
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Researchers from Boston University School of Medicine (BUSM) have shown that fat collection in different body locations, such as around the heart and the aorta and within the liver, are associated with certain decreased heart ...
NSLS-II Project Beamline Conceptual Designs
Nov 10, 2009 |
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(PhysOrg.com) -- The NSLS-II Experimental Facilities Division achieved an important milestone in September when the conceptual design reports for the initial six project beamlines were completed and submitted to NSLS-II management.
Gamma knife treatment for glioblastomas shows promising results
Nov 02, 2009 |
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Researchers from University Hospitals Case Medical Center report promising results from a cutting-edge research study that treated the aggressive brain tumors glioblastoma multiforme (GBM) using a novel type of imaging called ...
Identifying Molecules in Infrared Could Lead to New Medicines
Oct 27, 2009 |
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(PhysOrg.com) -- An interdisciplinary team of researchers has created a new, ultra-sensitive technique to analyze life-sustaining protein molecules. The technique may profoundly change the methodology of biomolecular ...
Dysfunctional protein dynamics behind neurological disease?
Medicine & Health / Neuroscience
Oct 13, 2009 |
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Researchers at Lund University, Sweden, have taken a snapshot of proteins changing shape, sticking together and creating structures that are believed to trigger deadly processes in the nervous system. The discovery opens ...
New Twist on Favorite X-ray Technique Promises Ultrafast Molecular Studies
Oct 12, 2009 |
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(PhysOrg.com) -- A team of physicists from the Stanford Synchrotron Radiation Lightsource, including graduate student David Bernstein, have made a promising discovery that a well-known synchrotron technique ...
Hyper-SAGE boosts remote MRI sensitivity
Oct 09, 2009 |
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A new technique in Magnetic Resonance Imaging dubbed "Hyper-SAGE" has the potential to detect ultra low concentrations of clincal targets, such as lung and other cancers. Development of Hyper-SAGE was led ...
New technology detects chemical weapons in seconds
Chemistry / Analytical Chemistry
Oct 05, 2009 |
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Scientists at Queen's University Belfast are developing new sensors to detect chemical agents and illegal drugs which will help in the fight against the threat of terrorist attacks.
Breaking Down the Barrier for Smaller, Faster Electronic Devices
Oct 05, 2009 |
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(PhysOrg.com) -- A team of international researchers is the first to uncover the chemical composition and structure of a microelectronics element that is vital to producing ever smaller - and, thus, cheaper ...
Tracing ultra-fine dust
Oct 05, 2009 |
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Limit values for fine dust emissions are based on total particle weight. It is the ultra-fine particles, however, that are particularly harmful to health. A new technique separates them by size and identifies ...
Nanotechnology gets a new light touch
Oct 02, 2009 |
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(PhysOrg.com) -- Building the super-fast computers of the future has just become much easier thanks to an advance by Australian researchers that lets them grab hold of tiny electronics components and probe ...
Fluorescent co-enzyme is an early indicator for breast cancer
Oct 01, 2009 |
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(PhysOrg.com) -- Think back to high-school biology and you may recall some basics about cellular respiration: how organelles called mitochondria function like little power stations, converting nutrients from ...
Hydrogen-making algae's 'Achilles' heel' discovered
Sep 29, 2009 |
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(PhysOrg.com) -- Scientists have discovered how oxygen stops green algae from producing hydrogen. The findings could help those working towards 'solar H2-farms' in which microorganisms produce hydrogen fuel ...
Scientists to go where no chemists has gone before
Sep 28, 2009 |
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Scientists at The University of Nottingham have overcome one of the significant research challenges facing electrochemists. For the first time they have found a way of probing right into the heart of an electrochemical reaction.
New INL project tackles nuclear fuel recycling science
Sep 24, 2009 |
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(PhysOrg.com) -- A new research project at Idaho National Laboratory and Argonne National Laboratory will use an innovative approach to learn how to get more use from nuclear fuel.
