The unit of measurement for the strength of a magnetic field is the tesla (T). This unit is named after the inventor Nikola Tesla. A magnetic field is often expressed in terms of its magnitude and direction, indicating how strong the field is at a given point and which way the magnetic force is acting. In addition to tesla, other units like the gauss (G) are also used, particularly in less intense fields, where 1 tesla equals 10,000 gauss. Understanding magnetic field strength is essential in various fields, including physics, engineering, and the medical field for technologies like MRI.