How old TVs worked | Cathode Ray Tube Explained

Disclaimer: the animations of electrons shouldn't be taken too literally. Electrons don't look like that and the final CRT TV model is only to give you an idea of how a real one works but is of course more complicated.

[@douglasstrother6584]

Vacuum Electron Devices, Baby!

[@michaelanderson3096]

This device can be used to propel space craft in outer space.

[@rech-ka]

I don't understand why the electrons don't go back to the accelerating anode?

[@Unnamed_Project223]

Great question! This is because the electrons already have momentum when passing through the anode. After passing through it might slow them down, but the electric field isn't strong enough to pull them back in, which is why they don't go back. Hope this helps, if something isn't entirely clear just say so.

[@rech-ka]

@@Unnamed_Project223 At school, we were taught Coulomb's law, where the force of attraction is inversely proportional to the square of the distance. However, they didn't tell us anything about the force of repulsion. Based on the analogy with Newton's law of planetary attraction, the acceleration time should correspond to the deceleration time, i.e. at a distance from the cathode to the anode on the reverse side, the electron should stop. However, from the cathode side, the electron is in an electric field between the cathode and the anode, and after the passage of the anode, there is no external electric field. Maybe that's the reason.

[@MrYerak5]

Cant hear