Emission Spectroscopy is a technique used to analyze the light emitted by substances when they are energized. When atoms or molecules absorb energy, they can become excited and then release that energy in the form of light as they return to their stable state. This emitted light can be measured and analyzed to identify the specific elements or compounds present in a sample. The emitted light is separated into its component wavelengths using a spectrometer, creating a spectrum. Each element has a unique emission spectrum, acting like a fingerprint that helps scientists determine the composition of materials in various fields, including astronomy, chemistry, and environmental science.