n. the ability to differentiate the level of brightness. Discriminating the degree of brightness, however, depends on the visual acuity of the observer, the wavelength of light, and the sensitivity to light and color as perceived.
n. the ability to differentiate the level of brightness. Discriminating the degree of brightness, however, depends on the visual acuity of the observer, the wavelength of light, and the sensitivity to light and color as perceived.