6/1/2023 0 Comments Tv televisorMuch attention was focused on increasing the picture resolution (high-definition television ) and on changing the dimensions of the television receiver to show wide-screen pictures. Improvements have been made continuously since that time, and television technology changed considerably in the early 21st century. The technical standards for modern television, both monochrome (black-and-white) and colour, were first established in the middle of the 20th century. Television is now delivered in a variety of ways: “over the air” by terrestrial radio waves (traditional broadcast TV) along coaxial cables (cable TV) reflected off of satellites held in geostationary Earth orbit (direct broadcast satellite, or DBS, TV) streamed through the Internet and recorded optically on digital video discs (DVDs) and Blu-ray discs. Conceived in the early 20th century as a possible medium for education and interpersonal communication, it became by mid-century a vibrant broadcast medium, using the model of broadcast radio to bring news and entertainment to people all over the world. By extending the senses of vision and hearing beyond the limits of physical distance, television has had a considerable influence on society. ![]() Television (TV), the electronic delivery of moving images and sound from a source to a receiver. Since starting at MSNBC last September, former White House press secretary Jen Psaki hasn't been hard to find on the air SpaceNext50 Britannica presents SpaceNext50, From the race to the Moon to space stewardship, we explore a wide range of subjects that feed our curiosity about space!.Learn about the major environmental problems facing our planet and what can be done about them! Saving Earth Britannica Presents Earth’s To-Do List for the 21st Century.100 Women Britannica celebrates the centennial of the Nineteenth Amendment, highlighting suffragists and history-making politicians.COVID-19 Portal While this global health crisis continues to evolve, it can be useful to look to past pandemics to better understand how to respond today.Student Portal Britannica is the ultimate student resource for key school subjects like history, government, literature, and more.This Time in History In these videos, find out what happened this month (or any month!) in history. ![]() ![]() #WTFact Videos In #WTFact Britannica shares some of the most bizarre facts we can find.Demystified Videos In Demystified, Britannica has all the answers to your burning questions.Britannica Classics Check out these retro videos from Encyclopedia Britannica’s archives.Britannica Explains In these videos, Britannica explains a variety of topics and answers frequently asked questions.
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