the emission of electrons by certain metals when the appropriate wavelength of light is shined on them.
Emission of electrons from a metal when applying light with photon energy larger than the workfunction of the metal
Ejection of electrons from an atom or molecule that has absorbed a photon of sufficient energy. The photoelectric effect is the operating principle behind "electric eyes"; it is experimental evidence for particle-like behavior of electromagnetic radiation.
When electromagnetic radiation shines upon a metal, the surface of the metal releases energized electrons. The way in which these electrons are released contradicts classical theories of electromagnetic radiation and supports the quantum view according to which electromagnetic waves are treated as particles.
a process in which electrons are ejected by certain metals when light of sufficient frequency shines on them.
Changes in the electrical characteristics of substances due to radiation, generally in the form of light. The photoelectric absorption of photons ( gamma rays) in the photoelectric effect is one of the interactions between gamma rays and matter. See further explanation under photoelectric absorption, and compare pair production and Compton scattering.
When charged particles are released from a material when it absorbs radiant energy.(Basic Science/Radiography/ionization/photoelectric_popup.htm)
The emission of electrons from matter by photons of electromagnetic radiation. Click on graphic to enlarge
Photoelectric effect is the complete absorption of a photon by a solid with the emission of an electron. The energy of a photon ( hÎ½) is
Experiment concerning the detection of electrons from a metal surface, whose speed off the surface was dependent on the frequency of light striking the surface. The theoretical explanation rests on viewing light as made up of photons, or individual bullets of energy.
The formation and liberation of electrons in materials when irradiated by light or other e-m waves.
The ejection, by a photon, of an electron from the surface of an object.
the ejection of electrons from metallic surfaces by illuminating light
takes place when irradiation with light or electromagnetic radiation frees electrically charged particles from a material. This phenomenon was explained by Albert Einstein in 1905 using the concept of light particles or photons
this occurs when a photon strikes a metal surface causing an electron to be ejected.
(or emission) The emission of electrons from metals by the action of light.
Collision process between an x-ray or gamma rays and a bound atomic electron where the photon disappears, the bound electron is ejected, and the incident energy is shared between the ejected electron and the remaining atom. The photon energy must be greater than the atomic binding energy. The probability for the photoelectric effect is approximately proportional to Z5 of the absorber and falls of by about E(gamma)3.5.
process by which a photon ejects an electron from an atom. All the energy of the photon is absorbed in ejecting the electron and in imparting energy to it.
A basic physical phenomenon that demonstrates radiation to be composed of particles.
Absorption of an x ray by ionization.
(noun) Event in which charge particles are released from a material when it absorbs radiant energy. (This happens with cameras and film…)
The ejection of electrons from a metal by the influence of light incident on the metal.
Emission of an electron from the surface of a metal caused by impinging electromagnetic radiation of certain minimum energy; current increases with increasing intensity of radiation.
the emission of electrons from a material as a result of light striking its surface
Any process in which illumination of a material by electromagnetic radiation causes electrons to be separated from atoms or molecules. Photoelectric effect is often synonymous with surface photoelectric effect, "the release of electrons by light at the boundary between a solid or liquid . . . and usually a gas" (Hughes and Dubridge 1932). The photoelectric effect was discovered in 1887 by Heinrich Hertz. The fundamental law of photoelectricity is the Einstein law where is the (maximum) kinetic energy of the emitted photoelectron, Î½ is the frequency of the source of illumination, is Planck's constant, and is the (minimum) difference between the potential energy of an electron inside and outside the material to which it is bound. An implicit assumption underlying this equation is that the initial kinetic energy of the electron is negligible compared with its maximum kinetic energy. The Einstein law played a fundamental role in establishing the quantum theory of light (Leighton 1959). Hughes, A. L., and L. A. DuBridge, 1932: Photoelectric Phenomena, 1â€“2. Leighton, R. B., 1959: Principles of Modern Physics, 67â€“69.
The production of an electric current when a beam of light is shined on a metal.
The photoelectric effect is a quantum electronic phenomenon in which photoelectrons are emitted from matter after the absorption of energy from electromagnetic radiation such as x-rays.Serway, R. S.(1990), p1150 Describes the photoelectric effect as the "Emission of photoelectrons from matter", and describes the original usage as the "Emission of Photoelectrons from metallic surfaces" after the experiments of Milikan, and others. The effect is also termed the Hertz Effecthttp://scienceworld.wolfram.com/physics/HertzEffect.html Wolfram Scienceworld describes the terminology of the photoelectric effect and the previous usage of the term Hertz Effect'., due to its discovery by Heinrich Rudolf Hertz, although the term has generally fallen out of use in more current terminology.