Wavenumber in vacuum

{
  "id": "MLC-T-CHM-012658",
  "term": "Wavenumber in vacuum",
  "field": "Chemistry",
  "definition": "The reciprocal of the wavelength of electromagnetic radiation as it propagates through a perfect vacuum, representing the number of waves per unit length. This is a fundamental spectroscopic quantity, directly proportional to the energy of the photon. It is commonly expressed in units of reciprocal centimeters (cm⁻¹).",
  "synonyms": [
    "vacuum wavenumber"
  ],
  "subject": "Analytical Chemistry",
  "see_also": [
    "electromagnetic radiation",
    "wavelength in vacuum"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 678 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/wavenumber-in-vacuum/"
}