What does optical reflectivity mean?

Optical reflectivity refers to the fraction of incident light that is reflected off a surface rather than transmitted or absorbed. It is a critical parameter in optics and materials science, often expressed as a percentage. Reflectivity depends on various factors, including the material's properties, the angle of incidence, and the wavelength of the light. High reflectivity materials are commonly used in mirrors and coatings to enhance light management in optical devices.