Sir George Stokes

Sir George Stokes was a 19th-century physicist known for his significant contributions to optics and fluid dynamics. In the context of spectroscopy, he is best known for Stokes' law and the concept of "Stokes shift." This concept explains how the wavelength of light emitted by a substance can be longer (lower energy) than that of the absorbed light. This shift helps scientists understand molecular structures and interactions. His work laid the groundwork for the development of various optical instruments and techniques that are crucial in fields like chemistry and biology for analyzing material properties.