Physics, Optics.
a measure of the rate of decrease in the intensity of electromagnetic radiation, as light, as it passes through a given substance.
[ 1895-1900 ]
Physics, Optics.
a measure of the rate of decrease in the intensity of electromagnetic radiation, as light, as it passes through a given substance.
[ 1895-1900 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012