Photoelectric effect - Wikipedia
The photoelectric effect is the emission of electrons from a material caused by electromagnetic radiation such as ultraviolet light. Electrons emitted in this manner are called photoelectrons.
6.3: Photoelectric Effect - Physics LibreTexts
When a metal surface is exposed to a monochromatic electromagnetic wave of sufficiently short wavelength (or equivalently, above a threshold frequency), the incident radiation is absorbed and the exposed surface emits electrons. This phenomenon is known as the photoelectric effect.
Photoelectric Effect - The Physics Hypertextbook
Under the right circumstances light can be used to push electrons, freeing them from the surface of a solid. This process is called the photoelectric effect (or photoelectric emission or photoemission), a material that can exhibit this phenomenon is said to be photoemissive, and the ejected electrons are called photoelectrons; but there is ...
6.2 Photoelectric Effect - University Physics Volume 3 - OpenStax
Electrons that are emitted in this process are called photoelectrons. The experimental setup to study the photoelectric effect is shown schematically in Figure 6.8. The target material serves as the cathode, which becomes the emitter of photoelectrons when it is illuminated by monochromatic radiation. We call this electrode the photoelectrode ...
Photoelectric Effect: Definition, Equation and Work Function
2023年9月19日 · The photoelectric effect refers to the phenomenon where light, typically in the form of photons, can cause the emission of electrons from a material’s surface. In simple terms, when light shines on a material, it can transfer its energy to electrons within the material.
Photoelectron - an overview | ScienceDirect Topics
Photoelectrons are those electrons which are produced when an energetic photon of radiation strikes a molecule, and the analysis of the spectrum of energies which they possess gives rise to the photoelectron spectrum. Since electrons are in general fairly firmly bound within molecules, the exciting radiation must be in the UV region of the ...
11.3: The Photoelectric Effect - Chemistry LibreTexts
2020年8月10日 · While working with a spark-gap transmitter (a primitive radio-broadcasting device), Hertz discovered that upon absorption of certain frequencies of light, substances would give off a visible spark. In 1899, this spark was identified as light-excited electrons (called photoelectrons) leaving the metal's surface by J.J. Thomson (Figure 1.3.1 ).
Radiation - Photoelectric, Photons, Electrons | Britannica
2024年11月4日 · The photoelectric effect is caused by the absorption of electromagnetic radiation and consists of electron ejection from a solid (or liquid) surface, usually of a metal, though nonmetals have also been studied. In the case of a gas, the term photoionization is more common, though there is basically little difference between these processes.
Photoelectric Effect – University Physics Volume 3
The photoelectric effect occurs when photoelectrons are ejected from a metal surface in response to monochromatic radiation incident on the surface. It has three characteristics: (1) it is instantaneous, (2) it occurs only when the radiation is above a cut-off frequency, and (3) kinetic energies of photoelectrons at the surface do not depend of ...
Absolute timing of the photoelectric effect | Nature
2018年9月19日 · Photoemission spectroscopy is central to understanding the inner workings of condensed matter, from simple metals and semiconductors to complex materials such as Mott insulators and superconductors...