Electromagnetic transition

{
  "id": "MLC-T-CHM-003697",
  "term": "Electromagnetic transition",
  "field": "Chemistry",
  "definition": "A transition between two energy states of an atom, molecule or ion that is accompanied by the absorption or emission of a photon. The photon frequency follows from the energy difference between the two states through the relation h times frequency equals E2 minus E1, where h is the Planck constant. Electronic, vibrational, rotational and spin transitions are all examples, and each obeys electromagnetic selection rules.",
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 657 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/electromagnetic-transition/"
}