Absorption line

{
  "id": "MLC-T-MET-003204",
  "term": "Absorption line",
  "field": "Meteorology and atmospheric science",
  "definition": "A narrow dip in a spectrum, at the wavelength where atoms or molecules absorb photons that match a transition between quantized energy levels, which may be electronic, vibrational, or rotational. Atmospheric infrared and microwave lines come mainly from vibrational and rotational transitions of molecules such as water vapor, carbon dioxide, and ozone, and their positions and strengths are used to identify gases and retrieve concentrations.",
  "url": "https://mlchart.com/terminology/meteorology/absorption-line/"
}