English Primary color Cited by user Mikhail Ryazanov on 23 Oct 2022 A set of primary colors or primary colours (see spelling differences) consists of colorants or colored lights that can be mixed in varying amounts to produce a gamut of…
English Cathode-ray tube Cited by user Chris Capoccia on 11 Dec 2020 The cathode-ray tube (CRT) is a vacuum tube that contains one or more electron guns and a phosphorescent screen, and is used to display images.