photoelectric effect meaning
The phenomenon whereby temporary changes occur in the atoms of certain substances under the influence of infrared, visible light, or ultraviolet radiation. Some of these materials undergo a change in their electrical resistance, whereas others generate electric current (see, for comparison, PHOTOCONDUCTIVE MATERIAL and PHOTOVOLTAIC MATERIAL).
- this is obviously due to the compton and photoelectric effects.
- another phenomenon mentioned by einstein was the so-called photoelectric effect.
- early experiments on the photoelectric effect had not produced consistent results.
- the photoelectric effect and the compton effect, then, both seem to demand a return to a corpuscular theory of light.
- two of the three processes, photoelectric effect and pair production, eliminate the photons undergoing interaction.