1 This wide-field view of the sky around the bright star Alpha Centauri was created from photographic images forming part of the Digitized Sky Survey 2. The star appears so big just because of the scattering of light by the telescope's optics as well as in the photographic emulsion.
Electronics is the science of controlling electrical energy electrically, in which the electrons have a fundamental role. Electronics deals with electrical circuits that involve active electrical components such as vacuum tubes, transistors, diodes, integrated circuits, associated passive electrical components, and interconnection technologies.
What is an electronic circuit? A circuit is a structure that directs and controls electric currents, presumably to perform some useful function. The very name circuit implies that the structure is closed, something like a loop. Current: Charge is mobile and can flow freely in certain materials, called conductors.