Absorptance

{
  "id": "MLC-T-CHM-000073",
  "term": "Absorptance",
  "field": "Chemistry",
  "definition": "The fraction of incident radiant power that is absorbed by a sample. It is a dimensionless quantity, ranging from 0 to 1, representing the efficiency with which a material absorbs electromagnetic radiation. Absorptance is related to transmittance and reflectance by the equation A + T + R = 1, where A is absorptance, T is transmittance, and R is reflectance.",
  "synonyms": [
    "absorption factor"
  ],
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "absorbance",
    "radiant power"
  ],
  "references": [
    "Green Book, 2nd ed., p. 32 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/absorptance/"
}