Television , sometimes shortened to tele or telly, is a telecommunication medium used for transmitting moving images in monochrome , or in color, and in two or three dimensions and sound.
Television became available in crude experimental forms in the late 1920s, but it would still be several years before the new technology would be marketed to consumers. After World War II, an improved form of black-and-white TV broadcasting became popular in the United States and Britain, and television sets became commonplace in homes, businesses, and institutions.During the 1950s, television was the primary medium for influencing public opinion. In the mid-1960s, color broadcasting was introduced in the US and most other developed countries.The availability of multiple types of archival storage media such as Betamax and VHS tapes, high-capacity hard disk drives, DVDs, flash drives, high-definition Blu-ray Discs, and cloud digital video recorders has enabled viewers to watch pre-recorded materialsuch as moviesat home on their own time schedule.
Another development was the move from standard-definition television to high-definition television , which provides a resolution that is substantially higher.
Television signals were initially distributed only as terrestrial television using high-powered radio-frequency transmitters to broadcast the signal to individual television receivers. A standard television set is composed of multiple internal electronic circuits, including a tuner for receiving and decoding broadcast signals.
