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.
A Charlie horse, or leg cramp, can be a symptom for many different things. It can be caused by deficiencies of such things as magnesium or potassium. You can even also get a charlie horse by being struck suddenly. Charlie horse, or leg cramp, can be a symptom for many different things. It can be caused by deficiencies of such things as magnesium or potassium. You can even also get a charlie horse by being struck suddenly.