The photoelectric effect or photoemission is the emission of electrons or other free carriers when light is shone onto a material. Electrons emitted in this manner can be called photoelectrons. The phenomenon is commonly studied in electronic physics, as well as in fields of chemistry, such as quantum chemistry or electrochemistry.
According to classical electromagnetic theory, this effect can be attributed to the transfer of energy from the light to an electron. From this perspective, an alteration in the intensity of light would induce changes in the rate of emission of electrons from the metal. Furthermore, according to this theory, a sufficiently dim light would be expected to show a time lag between the initial shining of its light and the subsequent emission of an electron. However, the experimental results did not correlate with either of the two predictions made by classical theory. Wikipedia, photoelectric effect
Optic Dynamo-Generator - Pages 1-5
Optic Dynamo-Generator - Pages 41-46
Optic Dynamo-Generator - Pages 47-50
Russells Optic Dynamo-Generator
Table 13.03 - Photoelectric Effect of Elements