Spherical radiance

{
  "id": "MLC-T-CHM-011186",
  "term": "Spherical radiance",
  "field": "Chemistry",
  "definition": "A radiometric quantity equal to the radiant exitance: the radiant power leaving a source, summed over all directions and over the whole wavelength range, per unit area of the emitting surface. Its SI unit is the watt per square metre, with no solid-angle division, unlike radiance. It is the integral of radiance, weighted by the cosine of the emission angle, over the solid angle of the hemisphere.",
  "subject": "Organic and Biomolecular Chemistry",
  "see_also": [
    "angle",
    "radiant exitance",
    "radiant power",
    "wavelength"
  ],
  "references": [
    "PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2276 (https://doi.org/10.1351/pac199668122223)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/spherical-radiance/"
}