Spectroscopy is a scientific technique used to analyze the interactions between matter and electromagnetic radiation. It involves studying how different materials interact with light across a range of wavelengths, which can provide valuable information about the composition, structure, and properties of the material being studied. Spectroscopy is widely used in various fields such as chemistry, physics, astronomy, and biology to identify and characterize substances, determine molecular structures, monitor chemical reactions, and analyze astronomical objects. Overall, spectroscopy plays a crucial role in advancing our understanding of the physical and chemical properties of different materials in various scientific disciplines.