Physics. an electron lens using magnetic fields for focusing an electron beam.
a set of magnets, esp electromagnets, used to focus or defocus a beam of charged particles in an electron microscope, particle accelerator, or similar device
noun 1. the suspension of an object above or below a second object by means of magnetic repulsion or attraction. 2. Railroads. the suspension of a vehicle above or below a suitable guide rail by such means, often with the vehicle being propelled by a linear induction motor. A process by which a magnet moving […]
- Magnetic memory storage
A system of storing information through the alignment of small grains in a magnetic material. Once the grains have been aligned by an external magnetic field, the information remains stored for long periods of time. This is the technique used in the hard drives of computers as well as in magnetic tape.
noun 1. a line on the earth’s surface, passing in the direction of the horizontal component of the earth’s magnetic field. noun 1. a continuous imaginary line around the surface of the earth passing through both magnetic poles magnetic meridian An imaginary reference line passing through both geomagnetic poles of the Earth, used in models […]
noun, Navy. 1. an underwater mine set off by any disturbance of its magnetic field, as by the metal hull of a ship. noun 1. a mine designed to activate when a magnetic field such as that generated by the metal of a ship’s hull is detected