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.
Basic Electronics Terms and Definitions The following is a list of many of the terms one would encounter in the study of basic electronics. The terms are defined in their electronics context. Alternating Current (ac) Current from a power source that changes polarity periodically.