Reflective power refers to the ability of a surface or material to reflect light or other forms of radiation. Synonyms for reflective power include reflectivity, shine, luster, gleam, sparkle, gloss, sheen, radiance, brilliance, and luminosity. Reflectivity is often used in physics to describe the amount of light that is reflected by a surface. Shine, luster, and sheen are used to describe the quality of the reflection, with shine typically referring to a bright and glossy reflection, while luster and sheen imply a softer and more subtle reflection. Gleam and sparkle are often used to describe a surface that reflects light in a way that creates a twinkle or flicker effect. Radiance, brilliance, and luminosity are used to describe a surface that seems to emit light itself, rather than just reflect it.