The ratio of luminous flux at a specific wavelength to the radiant flux at the same wavelength.
the quality of being luminous; emitting or reflecting light
That component of a video signal that carries information about brightness
The pathway or route of such illumination to a person:
Find another word for luminousness. In this page you can discover 5 synonyms, antonyms, idiomatic expressions, and related words for luminousness, like: luminosity, brightness, brightness level, luminance and light.