- #1
cragar
- 2,552
- 3
When my Tv shoots electrons from the cathode ray tube , where do these electrons come from and is it ionizing whatever they come from.
cragar said:When my Tv shoots electrons from the cathode ray tube , where do these electrons come from and is it ionizing whatever they come from.
A cathode ray tube is a vacuum tube that uses an electron gun to produce a beam of electrons, which are then focused and deflected onto a phosphorescent screen to create an image.
A cathode ray tube uses a heated cathode to emit electrons through thermionic emission. These electrons are then accelerated towards a positively charged anode, and focused into a narrow beam by a series of charged plates.
When the electron beam from a CRT collides with gas molecules, it can transfer energy to the molecules, causing them to become ionized. This process is known as electron impact ionization and is used in CRT displays to create glowing colors on the screen.
CRTs have a long lifespan and can produce a high-intensity, focused beam of electrons. They are also relatively inexpensive compared to other electron sources and can be easily replaced or repaired.
CRTs were widely used in old television sets and computer monitors, but have since been replaced by newer technologies. However, they are still used in some specialized applications, such as oscilloscopes, medical imaging equipment, and particle accelerators.