Hosted by the National Institute of Standards and Technology (NIST), this article by W. Martin and W. Wiese introduces the basics of atomic structure and spectra. With regard to structure, there is an emphasis on terminology and notation. Topics of discussion include wavelengths, intensities, shapes of spectral lines, and LS coupling. Originally appearing in the Atomic, Molecular, and Optical...

At this website, the National Institute of Standards and Technology (NIST) offers the new Atomic Spectra Database Version 3.0, which "contains critically evaluated NIST data for radiative transitions and energy levels in atoms and atomic ions." Researchers can view the data by wavelengths or energy levels. Individuals can find articles summarizing the data and explaining the ground levels and...

Wiley Publishing presents this spectroscopy portal, intended to be "a definitive spectroscopy resource on the internet," and "fully interactive 'Virtual Community' -- the preferred forum for expert discussion, debate and the exchange of ideas." Spectroscopy Now encompasses news, features, conferences, book releases, jobs, and directories in a variety of subdisciplines of spectroscopy. From the...

This latest version of the Atomic Line List, hosted by the Department of Physics and Astronomy at the University of Kentucky and maintained by Peter van Hoof of the Canadian Institute for Theoretical Astrophysics, provides "a compilation of approximately 923,000 allowed, inter-combination and forbidden atomic transitions." The database allows users to identify observed atomic absorption and...

Peter Kaiser, an emeritus professor at York University, created this website about visual perception to supplement curriculum. After reading the introduction describing how to best utilize the materials, students and educators can find twenty four chapters covering many topics including, physics of the visual stimulus, the basics of Fourier analysis, and spectral sensitivity. For each topic, the...