An electromagnetic pulse (EMP) is an intense burst of electromagnetic (EM) energy caused by an abrupt, rapid acceleration of charged particles, usually electron s. An EMP can contain energy components over a large part of the EM spectrum, from very-low-frequency ( VLF) radio to ultraviolet ( UV) wavelength s. A lightning strike produces a localized EMP that gives rise to large electrical current s in nearby wires.
Definition of italic. 1  1a : of or relating to a type style with characters that slant upward to the right (as in âthese words are italicâ) â compare romanb : of or relating to a style of slanted cursive handwriting developed in the 15th and 16th centuries. 2  2 capitalized : of or relating to ancient Italy, its peoples, or their Indo-European languages.
Definition of icon for Students. 1  1 : a widely known symbol The Statue of Liberty has become an icon of freedom. 2  2 : a person who is very successful or admired a pop icon. 3  3 : a religious image usually painted on a small wooden panel. 4  4 : a small picture or symbol on a computer screen that represents a function that the computer can perform.