1. Rpebared by : Anas Mah. Najdawi EE. 0095370

2. A cathode ray tube (CRT) is a type of analog display device. Cathode ray tubes are special, electronic vacuum tubes that use focused electron beams to display images. Though tubes of this type are used for many purposes.

3. USES OF CRT. cathode ray tubes are most famous for their use in such things as : 1.Televisions. 2.Oscilloscopes. 3.Computer. 4.Radar displays. 5.Automated teller machines (ATM). 6.Video game equipment.

4. A cathode ray tube has a cathode or negatively charged terminal. In a cathode ray tube, this terminal is a heated filament, much like the filament seen in a light bulb. The filament is contained inside a vacuum within a glass tube.

5. Inside the tube, a beam of electrons is allowed to flow from the filament into the vacuum. The flow of the electrons is natural, not forced.

6. When used inside a television set, a CRT’s electrons are concentrated into a tight beam by a positively charged terminal, called an anode. An accelerating anode is then used to speed up the movement of the electrons. These fast-moving electrons fly through the tube’s vacuum, hitting the phosphor-coated screen and making it glow.

7. History of (CRT) : A German physicist named Karl Ferdinand Braun is credited with inventing the cathode ray tube in 1897. His invention consisted of a cathode ray tube with a fluorescent screen. This new technology was called a cathode ray oscilloscope (CRO). The screen of this tube would display a light when a beam of electrons touched it.

8. NOW ! The cathode ray tube still plays a major part in television sets and many other electronic devices. However, there have been many new developments in display technology, such as plasma screens, liquid crystal display televisions (LCD TVs), and digital light processing (DLP) devices. Organic light-emitting diode (OLED) displays are also used to produce images.