Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

NIST Atomic Spectra Database

  1. May 4, 2013 #1
    Hello all,

    What is mean the Ritz Wavelengths in the NIST Atomic Spectra Database?

    Why the Ritz or Observed value for some Wavelength are very different?

    Thanks,
    Lil
     
    Last edited: May 4, 2013
  2. jcsd
  3. May 5, 2013 #2
    See http://physics.nist.gov/PhysRefData/ASD/Html/lineshelp.html#OUTWAVELENGTH

    The Ritz wavelengths are calculated from the difference in the energy levels involved in the transition, whereas the observed values are the experimental data. The accuracy of the Ritz wavelengths obviously depends on the accuracy of the calculated energy levels, and the accuracy of the observed values is limited by experimental precision, so some transitions can give quite different wavelengths.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook