Light can carry enough electric energy to knock electrons out of atoms {photoelectric effect}|. If light frequency is below threshold for material, atoms emit no electrons, because photoelectric effect requires minimum energy. Light with higher frequency than threshold imparts more speed to liberated electrons but does not emit more electrons. Higher-intensity light, which has more photons with enough energy, makes more electrons leave.
Physical Sciences>Physics>Wave>Electromagnetic
5-Physics-Wave-Electromagnetic
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0224