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Topic: Spectroscopy


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In the News (Fri 24 May 19)

  
  Spectroscopy - Wikipedia, the free encyclopedia
Spectroscopy is the study of spectra, that is, the dependence of physical quantities on frequency.
Spectroscopy is often used in physical and analytical chemistry for the identification of substances, through the spectrum emitted or absorbed.
Raman spectroscopy uses the inelastic scattering of light to analyse vibrational and rotational modes of molecules.
en.wikipedia.org /wiki/Spectroscopy   (1765 words)

  
 Zoom Astronomy Glossary: Spectroscopy
Spectroscopy is a technique in which the visible light that comes from objects (like stars and nebulae) is examined to determine the object's composition, temperature, motion, and density.
Spectroscopy was discovered in 1859 by Gustav Robert Kirchhoff and Robert Wilhelm Bunsen (of Bunsen burner fame).
Spectroscopy is a scientific technique in which the visible light coming from objects (like stars and nebulae) is examined to determine the object's composition, temperature, density, and velocity.
enchantedlearning.com /subjects/astronomy/glossary/spectroscopy.shtml   (1518 words)

  
 General Spectroscopy Overview
For example, in fluorescence emission spectroscopy, the frequency and amount of light scattered by the sample is measured as the frequency of the laser light is varied.
One potential limitation to resolution in the spectroscopy of gases arises from the motion of the atoms or molecules relative to the observer.
In spectroscopy, the principal interferometers are those developed by the American physicist A.A. Michelson (1881) in an attempt to find the luminiferous ether--a hypothetical medium thought at that time to pervade all space--and by two French physicists, Charles Fabry and Alfred Perot (1896), specifically for high-resolution spectroscopy.
www.pharm.uky.edu /ASRG/general_spectroscopy.html   (3311 words)

  
 NMR Spectroscopy
Nmr spectroscopy is therefore the energetically mildest probe used to examine the structure of molecules.
Unlike infrared and uv-visible spectroscopy, where absorption peaks are uniquely located by a frequency or wavelength, the location of different nmr resonance signals is dependent on both the external magnetic field strength and the rf frequency.
C nmr spectroscopy is the use of high-field pulse technology coupled with broad-band heteronuclear decoupling of all protons.
www.cem.msu.edu /~reusch/VirtualText/Spectrpy/nmr/nmr1.htm   (6032 words)

  
 ScienceLives! Online - Astronomy - Spectroscopy
Spectroscopy is defined as: "The study of spectra, including the position and intensity of emission and absorption lines."[F1] Scientists can study the light coming from distant stars to find information about those stars.
Spectroscopy has also revealed the fact that the sun is composed mainly of hydrogen and helium.
Spectroscopy: the study of spectra, including the position and intensity of emission and absorption lines.
www.sciencelives.com /spectroscopy.html   (1478 words)

  
 Amateur Spectroscopy
Spectroscopy by definition is the decomposition of electromagnetic radiation (Visible light in this case) into the frequency domain.
Each chemical element emits or absorbs radiation at defined frequencies hence the light source may then be analyzed for it's chemical makeup.With the advent of inexpensive CCD technology such as the Cookbook series of imagers and more recently webcams the amateur now has multiple options for the recording of astronomical spectra.
The application is quite capable of calibrating both non-linear prism spectra as well as the mostly linear dispersion produced by a transmission or reflective type grating.
www.geocities.com /rlaude2000   (553 words)

  
 Raman Spectroscopy
In the discussion of Raman spectroscopy, we use language from particle theory and we say that a photon is scattered by the molecular system.
Raman Spectroscopy is based on the Raman effect, which is the inelastic scattering of photons by molecules.
For highly symmetric polyatomic molecules possessing a center of inversion (such as benzene) it is observed that bands that are active in the IR spectrum are not active in the Raman spectrum (and vice-versa).
carbon.cudenver.edu /public/chemistry/classes/chem4538/raman.htm   (2082 words)

  
 101 - Spectroscopy Link - www.101science.com
Spectroscopy is the study of the interaction of electromagnetic radiation, such as ultra-violet and visible light, with matter.
Ultra-violet and visible light spectroscopy is the measurement of the wavelength and intensity of transmittance or absorption of ultraviolet and
Spectroscopy is emphasized (pmr, cmr, ir, ms, uv) and the
www.101science.com /spectroscopy_links__www.htm   (289 words)

  
 USGS Spectroscopy Lab: Spectroscopy of Rocks and Minerals, and Principles of Spectroscopy   (Site not responding. Last check: 2007-10-22)
Spectroscopy is the study of light as a function of wavelength that has been emitted, reflected or scattered from a solid, liquid, or gas.
Spectroscopy's historical disadvantage is that it is too sensitive to small changes in the chemistry and/or structure of a material.
Spectroscopy is more sensitive to the presence of clays, iron oxides, iron hydroxides, quartz, and other minerals with strong absorption bands at levels significantly lower than other methods such as X-ray diffraction (e.g.
speclab.cr.usgs.gov /PAPERS.refl-mrs/refl4.html   (13916 words)

  
 Physics Encyclopedia: Optical spectroscopy
Spectroscopy - a larger set of online lecture notes by T. Cafolla; covers vibrational, rotational and Raman spectroscopy.
Spectroscopy on Internet - a very large list of links related to IR and sub-IR spectroscopy - spectra databases, research groups, online publications, tutorials, newsgroups etc.
Spectroscopy - a very rich site on intrumentation, methods and techniques of experimental spectroscopy; by SciMedia.
members.tripod.com /~IgorIvanov/physics/spectroscopy.html   (259 words)

  
 CHP - Spectroscopy   (Site not responding. Last check: 2007-10-22)
Spectroscopy is the use of the absorption, emission, or scattering of electromagnetic radiation by matter to qualitatively or quantitatively study the matter or to study physical processes.
Scattering might or might not occur with a transfer of energy, i.e., the scattered radiation might or might not have a slightly different wavelength compared to the light incident on the sample.
Spectroscopy Index - information on specific spectroscopic techniques.
www.chem.vt.edu /chem-ed/spec/spectros.html   (187 words)

  
 Spectroscopy   (Site not responding. Last check: 2007-10-22)
With this technique we stabilize a transfer cavity using a RF current-modulated diode laser which is injection locked to a 780 nm reference diode laser.
A Ti:sapphire ring laser at 960 nm is locked to this transfer cavity and may be precisely scanned by varying the RF modulation frequency.
In a spectroscopy of the gesture, we also see them using different devices   crutches, rope, prostheses, horizontal bars, and harnesses   which at times liberate their movements, at others fetter it, and at still others...
www.ljseek.com /Spectroscopy_s4.html   (807 words)

  
 The Science of Spectroscopy (www.scienceofspectroscopy.info)
Spectroscopy theory, applications and techniques in a site you can help build:
Using Wiki in Education - blog includes sections on practical wiki uses, reviews of wiki software, case studies on how courses are using wiki, and updates on The Science of Spectroscopy.
wiki, science, nasa, spectroscopy, spectrum, learning, education, university, light, instrument, theory, applications, nmr, ir, nuclear magnetic resonance, infrared, microscopy, afm, stm, sem, tem, x-ray, x-ray tube, xrf, xrd, esca, xps, ms, atomic force microscopy, scanning tunneling microscopy, scanning electron microscopy, transmission electron microscopy, ultraviolet, uv-vis, qualitative, quantitative, problems, molecule
www.scienceofspectroscopy.info   (127 words)

  
 Organic Chemistry On Line
Ion fragmentation patterns may be related to the structure of the molecular ion.
• Infrared Spectroscopy: Absorption of this lower energy radiation causes vibrational and rotational excitation of groups of atoms.
The associated problems all involve nmr spectroscopy, but also use data from infrared and mass spectrometry.
www.cem.msu.edu /~reusch/VirtualText/Spectrpy/spectro.htm#contnt   (655 words)

  
 Dynamics: Infrared Spectroscopy   (Site not responding. Last check: 2007-10-22)
A plot of the frequency of the incident radiation vs. some measure of the percent radiation absorbed by the sample is the absorption spectrum of the compound.
Vibrational spectroscopy (or infrared spectroscopy) measures transitions from one molecular vibrational energy level to another, and requires radiation from the infrared portion of the electromagnetic spectrum.
An IR spectrum is displayed as a plot of the energy of the infrared radiation (usually expressed in wavenumbers) versus the percent of light transmitted by the compound.
www.wpi.edu /Academics/Depts/Chemistry/Courses/General/infrared.html   (3404 words)

  
 Spectroscopy   (Site not responding. Last check: 2007-10-22)
Spectroscopy is the use of the absorption, emission, or scattering of electromagnetic radiation by atoms or molecules (or atomic or molecular ions) to qualitatively or quantitatively study the atoms or molecules, or to study physical processes.
For atoms excited by a high-temperature energy source this light emission is commonly called atomic or optical emission (see atomic-emission spectroscopy), and for atoms excited with light it is called atomic fluorescence (see atomic-fluorescence spectroscopy).
For molecules it is called fluorescence if the transition is between states of the same spin and phosphorescence if the transition occurs between states of different spin.
elchem.kaist.ac.kr /vt/chem-ed/spec/spectros.htm   (470 words)

  
 Spectroscopy - Printed Books Shopping at dooyoo.co.uk
Spectroscopy of Emerging Materials: Proceedings of the NATO Arw on Frontiers in Spectroscopy of Emergent Materials, Recent Advances Toward New Technologies, Sudak, Crimea, Ukraine, from 14 to 18 September 2003.
I did not do a lot of spectroscopy as it is only a small part of my course.
When i was preparing my exam paper on spectroscopy in my second year, I got this very cheap textbook from home, the title is 'Spectroscopy', by Kemp.
www.dooyoo.co.uk /printed-books/spectroscopy   (511 words)

  
 JPL Molecular Spectroscopy   (Site not responding. Last check: 2007-10-22)
Molecular spectroscopy is the study of absorption of light by molecules.
In the gas phase at low pressures, molecules exhibit absorption in narrow lines which are very characteristic of the molecule as well as the temperature and pressure of its environment.
While the general user is welcome to browse its contents, the descriptions assume a knowledge of spectroscopy and quantum mechanics.
spec.jpl.nasa.gov   (695 words)

  
 Spectroscopy
In this month’s installment of “Chemometrics in Spectroscopy,” the authors again explore that vital link between statistics and chemometrics, this time with an emphasis on the statistics side.
Spectroscopy editor Prachi Patel-Predd provides a wrap-up of the 54th ASMS Conference, held this year at the Washington State Convention & Trade Center in Seattle, Washington.
Tunable diode laser absorption spectroscopy (TDLAS) has evolved from a laboratory specialty technique to the foundation for highly sensitive and specific gas-phase sensors for the process environment.
www.techexpo.com /toc/spectros.html   (1196 words)

  
 Society for Applied Spectroscopy Home Page
The Society is a non-profit organization dedicated to the dissemination of information related to spectroscopy.
The objective of this Society is to advance and disseminate knowledge and information concerning the art and science of spectroscopy and other allied sciences.
The term spectroscopy as used here means the science and art of absorption, emission, Raman, mass, and related forms of spectral study for determining the composition and structure of matter.
www.s-a-s.org   (179 words)

  
 BUBL LINK: Spectroscopy
Includes chapters on spin physics, spectroscopy and pulse sequences, and provides explanatory graphics which can be viewed alongside the text, a glossary and a list of symbols.
The objective of the Society for Applied Spectroscopy is to advance and disseminate knowledge and information concerning the art and science of spectroscopy and other allied sciences.
Collection of resources for the spectroscopy community including news stories and features, education and training materials, job information, listings of current literature and journals, and a calendar of conferences.
bubl.ac.uk /link/s/spectroscopy.htm   (738 words)

  
 Mineral Spectroscopy
This server provides information about mineralogy and is primarily dedicated to providing information about color in minerals and access to data on Mineral Absorption Spectra in the visible and infrared regions of the spectrum and Raman spectra of minerals.
Most data on the server were obtained in the Caltech mineral spectroscopy labs.
It is an updated version of the list of references which appeared in Chapter 7, Optical Spectroscopy in Reviews in Mineralogy volume 18 published by the Mineralogical Society of America.
minerals.gps.caltech.edu   (570 words)

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