Photoemitted

Photoemitted refers to electrons that are ejected from a material's surface when light, specifically photons with sufficient energy, strikes it. This phenomenon, known as the photoelectric effect, was first observed by Heinrich Hertz and later explained by Albert Einstein in 1905. The energy of the incident photon must overcome the work function of the material, which is the minimum energy required to remove an electron. If the photon's energy exceeds the work function, the excess energy is transferred to the emitted electron as kinetic energy. The number of photoemitted electrons is proportional to the intensity of the incident light, while their kinetic energy is dependent on the frequency of the light. This effect is fundamental to many technologies, including photomultiplier tubes, solar cells, and image sensors. The term "photoemitted" specifically describes the state of the electrons that have undergone this process of being emitted due to light interaction.