Luminosity refers to the perceived brightness of a light source or a reflective surface. It is a key factor in determining how light interacts with a scene and how bright objects appear in photographs or on-screen displays.
Understanding luminosity is important for photographers, cinematographers, and lighting designers who need to manage exposure, contrast, and tonal balance. By controlling luminosity, professionals can achieve well-lit, visually appealing images, accurately reproduce colors, and maintain detail in both highlights and shadows.