noun🔗ShareThe state of being luminous, or a luminous object; brilliance or radiance"The full moon's luminosity lit up the entire backyard, making it easy to see even without a flashlight. "physicsastronomyenergyappearanceChat with AIVocabulary GamePractice Reading
noun🔗ShareThe ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor"The physics lab carefully measured the luminosity of the new LED bulb to determine its efficiency in converting electrical power into visible light compared to the total energy it emitted. "physicsenergyastronomyscienceChat with AIVocabulary GamePractice Reading
noun🔗ShareThe rate at which a star radiates energy in all directions"Astronomers measure a star's luminosity to understand how bright it truly is. "astronomyphysicsenergyChat with AIVocabulary GamePractice Reading
