Photochemical equivalence

{
  "id": "MLC-T-CHM-008818",
  "term": "Photochemical equivalence",
  "field": "Chemistry",
  "definition": "The principle stating that each molecule undergoing a photochemical reaction absorbs one photon of light. This concept, also known as the Stark-Einstein law, applies to the primary photochemical act, where the initial absorption event leads to excitation. Deviations from this 1:1 ratio occur due to subsequent secondary reactions or energy transfer processes.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "laser"
  ],
  "references": [
    "PAC, 1996, 68, 149. 'A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC Recommendations 1996)' on page 176 (https://doi.org/10.1351/pac199668010149)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/photochemical-equivalence/"
}