Editing Zeeman effect (section)

===Metrology===
Old high-precision frequency standards, i.e. hyperfine structure transition-based atomic clocks, may require periodic fine-tuning due to exposure to magnetic fields. This is carried out by measuring the Zeeman effect on specific hyperfine structure transition levels of the source element (cesium) and applying a uniformly precise, low-strength magnetic field to said source, in a process known as [[degaussing]].<ref>{{cite AV media |people=Verdiell, Marc (CuriousMarc) |date=October 31, 2022 |title=How an Atomic Clock Really Works, Round 2: Zeeman Alignment |type=YouTube video |language=English |url=https://www.youtube.com/watch?v=xTy1kY_wtsY |access-date=March 11, 2023}}</ref>

The Zeeman effect may also be utilized to improve accuracy in [[atomic absorption spectroscopy]].{{Citation needed|date=March 2024}}