Physics, Optics.
a method for increasing the number of atoms or molecules occupying higher energy levels by irradiating them with light of the proper frequencies to raise them to those levels.
[ 1950-55 ]
Physics, Optics.
a method for increasing the number of atoms or molecules occupying higher energy levels by irradiating them with light of the proper frequencies to raise them to those levels.
[ 1950-55 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012