The revised and updated fourth edition of a successful, clearly written Modern Spectroscopy introduces the reader to a wide range of spectroscopies and includes both the background theory and applications to structure determination and chemical analysis. It covers rotational, vibrational, electronic, photoelectron and Auger spectroscopy, as well as EXAFS and the theory of lasers and laser spectroscopy. New material includes laser detection and ranging (LIDAR), cavity ring-down spectroscopy, femtosecond lasers, femtosecond spectroscopy and very high resolution fluorescence of large molecules. In addition, the clarity of figures has been greatly improved and Professor Ben van der Veken at the University of Antwerp has run some new infrared spectra especially for this new edition. Table of Contents:Preface to the First EditionPreface to the Second EditionPreface to the Third EditionPreface to the Fourth EditionUnits, Dimensions and ConventionsFundamental ConstantsUseful Conversion FactorsSome Important Results in Quantum MechanicsElectromagnetic Radiation and Its Interaction with Atoms and MoleculesGeneral Features of Experimental MethodsMolecular SymmetryRotational SpectroscopyVibrational SpectroscopyElectronic SpectroscopyPhotoelectron and Related SpectroscopiesLasers and Laser SpectroscopyAppendixIndex of Atoms and MoleculesSubject Index