Applet Launcher Applet 1 Applet 2 Applet 3 Applet 4 Applet 5 Applet 6   Rotational Raman Spectroscopy Introduction page 2 of 3     Practical Navigator Introduction The Raman Effect Experimental Techniques 1. Rotational Raman Spectroscopy Interpreting the Spectrum Effect of Bond Length Centrifugal Distortion Intensities of Spectral Lines Nuclear Spin Statistics 2. Real Diatomic Molecules Temperature Spectrum of Nitrogen Isotopic Substitution Nuclear Spin Statistics Predict the Spectrum of Oxygen   You must be able to convert energy and frequency, but often spectroscopists are more interested in working with numbers which span a reasonable range, rather than always working in energy or frequency. In IR and Raman, the spectroscopic transition energies are generally quoted in wavenumber units. Wavenumbers are the inverse of the wavelength 1/. Because of the energies involved, it is generally most convenient to quote typical IR spectroscopic transitions in cm rather than m. When a beam of light is passed through a transparent substance, a small amount of the radiation energy is scattered, the scattering persisting even if all dust particles or other extraneous matter are rigorously excluded from the substance. If monochromatic radiation is used the scattered energy will consist almost entirely of radiation of the incident frequency.     << previous page www.physchem.ox.ac.uk next page >>