Atomic spectroscopy is a branch of analytical chemistry that involves the study of the electromagnetic radiation absorbed and emitted by atoms. This technique is used to identify and quantify the elemental composition of a sample by measuring the characteristic energy levels of atoms. Atomic spectroscopy encompasses various methods such as atomic absorption spectroscopy, atomic emission spectroscopy, and atomic fluorescence spectroscopy. These techniques are widely used in various fields including environmental monitoring, pharmaceutical analysis, food safety testing, and forensic investigation.