Contents Electromagnetic Spectrum Spectrum of Hydrogen atom Spectra of alkali and Alkaline elements Effect of magnetic and electric Fields x ray Spectra Micro wave or Far Infra red spectroscopy Near Infra red spectroscopy Ultra violet and Visible Spectroscopy Raman Spectra Electron Spin Resonance Spectroscopy Mass Spectroscopy Spectroscopy of Diatomic Molecules Spectroscopy of Polyatomic Molecules