Optical Emission Spectrometry (OES) is a specialized analytical technique used to determine the elemental composition of a sample. The method involves exciting atoms in the sample using an electrical spark or plasma, which causes them to emit light. By analyzing the resulting light emissions, researchers can identify the types and amounts of elements present in the sample. OES is widely used in fields such as materials science, environmental analysis, and forensics, and requires specialized training and equipment to perform accurately.