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Sanakirja

luminosity []

n fényesség [fˈeːɲɛʃʃeːɡ]

n (uncountable) the state of being luminous, or a luminous object; brilliance or radiance

n (physics) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor

n (astronomy) the rate at which a star radiates energy in all directions