Resonance fluorescence

{
  "id": "MLC-T-MET-008532",
  "term": "Resonance fluorescence",
  "field": "Meteorology and atmospheric science",
  "definition": "The process where an atom or molecule absorbs a photon of a specific wavelength and then re-emits a photon of the same wavelength. This phenomenon is used in atmospheric remote sensing to detect and quantify certain trace gases, such as hydroxyl radicals, by exciting them with a laser and measuring the emitted light. It provides highly sensitive measurements of atmospheric constituents.",
  "url": "https://mlchart.com/terminology/meteorology/resonance-fluorescence/"
}