The Raman Effect is a phenomenon in which light interacts with molecules, resulting in a change in the light's wavelength. When a beam of light, usually from a laser, passes through a sample, most of the light is scattered elastically, but a small fraction is scattered inelastically. This inelastic scattering provides information about the vibrational modes of the molecules in the sample. Discovered by C.V. Raman in 1928, the Raman Effect is significant in fields like chemistry and material science. It allows scientists to analyze the composition and structure of substances without needing to alter them, making it a valuable tool for non-destructive testing and analysis.