Spectroscopy has historically played an important role in the development of atomic
theory, and it is currently widely utilised in basic research. In forensic laboratories,
spectroscopic methods are commonly employed for quantitative and qualitative analysis. This
chapter gives an overview of the fundamental concepts of spectroscopy as they apply to
analytical measurements.
Keywords: Absorption maximum, Absorption spectra, Electromagnetic radiation, Emission spectra, Energy levels, Frequency, Rays, Rotational energy, Transitional energy, Vibrational energy, Wavenumber.
