Nyquist frequency

{
  "id": "MLC-T-CHM-008168",
  "term": "Nyquist frequency",
  "field": "Chemistry",
  "definition": "Half of the sampling rate of a discrete signal processing system. It represents the maximum frequency that can be unambiguously resolved in a sampled signal without aliasing. Any frequency component in the original signal above the Nyquist frequency will appear as a lower frequency in the sampled data, a phenomenon known as folding.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "Nyquist criterion",
    "folding",
    "wavenumber in vacuum"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 669 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/nyquist-frequency/"
}