 ##  [Photoelectric Effect](/index.php/photoelectric-effect) 

  ##  [Photoelectric Effect](https://natural.quantumdictionary.io/photoelectric-effect-0) 

  
 [![Natural & Formal Sciences Dictionary](/sites/default/files/styles/large/public/2026-01/Natural%20%26%20Formal%20Sciences.png.webp?itok=2kCDRVQv)](/index.php/topic-specific-dictionaries/natural-formal-sciences)


**Natural &amp; Formal Sciences Dictionary**

 
Definition

Emission of electrons from a material surface when it absorbs incident photons above a threshold energy.

 
 ##  [Photoelectric Effect](https://engineering.quantumdictionary.io/photoelectric-effect-1) 

  
 [![Engineering & Applied Technologies Dictionary](/sites/default/files/styles/large/public/2026-01/Engineering%20%26%20Applied%20Technologies.png.webp?itok=_IKO7_-n)](/index.php/topic-specific-dictionaries/engineering-applied-technologies)


**Engineering &amp; Applied Technologies Dictionary**

 
Definition

Emission of electrons from a material’s surface (or immediate interface) induced when incident photons have energy equal to or greater than the material’s work function or emission barrier, producing an electron emission current; the process shows a threshold photon energy and an energy distribution of emitted electrons correlated with photon energy above threshold.