Fine structure refers to the detailed and intricate components or characteristics within a broader system, often observed in physical, biological, or abstract contexts. In physics, particularly atomic and molecular physics, fine structure denotes the splitting of spectral lines into multiple closely spaced lines due to small energy differences. This phenomenon provides insights into the internal arrangements and interactions of particles within atoms. In biology, fine structure may refer to the detailed organization of cellular or subcellular components under a microscope. The term is versatile, used in different scientific disciplines to describe the nuanced elements that contribute to the overall complexity and understanding of a system or phenomenon.
