Since the distance between the Zeeman sub-levels is a function of the magnetic field, this effect can be used to measure the magnetic field, e.g. that of the Sun and other stars or in laboratory plasmas.
Charley horse: Slang for a cramp in a muscle in the leg, usually caused by a strain or injury. A charley horse can last anywhere from a few seconds to over a quarter of an hour. It is not uncommon for one to recur before it finally resolves.
The name Charlie is an American baby name. In American the meaning of the name Charlie is: From the Old English 'ceorl' meaning man. SoulUrge Number: 6. Expression Number: 11. People with this name have a deep inner desire for a stable, loving family or community, and a need to work with others and to be appreciated.