Spectroscopy is the study of the absorption, emission, or scattering of electromagnetic radiation, ranging from x-rays to radio waves, by atoms or molecules. The spectroscopic techniques are known as spectrometry and the instruments of spectrometry are called spectrometers. Spectrometers are used in astronomy, chemistry, earth and environmental science, and medicine, to name only some applications. For example, infrared spectroscopy is the study of the interaction of molecules with infrared radiation; that is, wavelengths from about 0.8 micrometer to 1 millimeter. Infrared spectrometers are used in chemical analysis to identify molecules because they have unique infrared absorption spectra. A spectrophotometer consists of a combination of two instruments: a spectrometer to separate light into individual wavelengths and a photometer to measure the intensity of light transmitted or reflected. See also: Absorption of electromagnetic radiation; Astronomical spectroscopy; Atomic spectrometry; Electromagnetic radiation; Emission spectrochemical analysis; Infrared spectroscopy; Microwave spectroscopy; Molecular structure and spectra; Photometer; Reflection of electromagnetic radiation; Scattering of electromagnetic radiation; Spectroscopy; X-ray spectrometry
How spectroscopy relates to spectrometry
- R. M. Granger II et al., Instrumental Analysis, Oxford University Press, 2016
- D. L. Pavia et al., Introduction to Spectroscopy, 5th ed., Cengage Learning, 2014
- J. W. Robinson, E. M. Skelly Frame, and G. M. Frame II, Undergraduate Instrumental Analysis, 7th ed., CRC Press, 2014
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Its dedicated editorial team is led by Sagan Award winner John Rennie. Contributors include more than 9000 highly qualified scientists and 39 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 17,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information