<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> The photoelectric effect is the emission of electrons or other free carriers when light shines on a material . Electrons emitted in this manner can be called photo electrons . This phenomenon is commonly studied in electronic physics, as well as in fields of chemistry, such as quantum chemistry or electrochemistry . </P> <P> 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 kinetic energy of the electrons emitted 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 . </P>

How is light given off by an element