noun Download 🔗Share The state of being luminous, or a luminous object; brilliance or radiance Examples : "The full moon's luminosity lit up the entire backyard, making it easy to see even without a flashlight. " physics astronomy energy appearance Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share The ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor Examples : "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. " physics energy astronomy science Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share The rate at which a star radiates energy in all directions Examples : "Astronomers measure a star's luminosity to understand how bright it truly is. " astronomy physics energy Chat with AIVocabulary GamePractice Reading