the mathematical operation of replacing every elementary particle by its antiparticle. Symbol: C.
A reversal of the sign of the charge, the magnetic moment, and other internal quantum numbers of every particle in the system to which it is applied, effectively turning every particle into its antiparticle. In the mathematics of quantum mechanics, this operation is denoted by the operator “C”. It had long been assumed that charge conjugation, together with parity conjugation, should leave the behavior of a physical system unchanged, but observations of kaon decay suggest this is not always the case. See also conservation law.
- Charge-coupled device
a semiconductor chip with a grid of light-sensitive elements, used for converting light images, as in a television camera, into electrical signals. Abbreviation: CCD. noun (computing) an electronic device, used in imaging and signal processing, in which information is represented as packets of electric charge that are stored in an array of tiny closely spaced […]
- Charge d’affaires
Also called chargé d’affaires ad interim. an official placed in charge of diplomatic business during the temporary absence of the ambassador or minister. an envoy to a state to which a diplomat of higher grade is not sent. noun (pl) chargés d’affaires (ˈʃɑːʒeɪ; -ʒeɪz; French) (ʃarʒe) the temporary head of a diplomatic mission in the […]
the measure of electrical charge per unit area of a surface or per unit volume of a body or medium. noun the electric charge per unit volume of a medium or body or per unit area of a surface charge density The electric charge per unit area or per unit volume of a body or […]
an enlisted person, usually a noncommissioned officer, who remains on duty and handles administrative matters in a military or other unit during the night or on holidays. the duty of a charge of quarters. noun (US) a member of the armed forces who handles administration in his unit, esp after duty hours