Here's how it works:
* Electron Gun: The CRT starts with an electron gun, which emits a stream of electrons.
* Electrostatic Deflection: Inside the CRT, there are sets of deflection plates (usually two pairs, for horizontal and vertical deflection). These plates are metal plates with a voltage applied to them.
* Electric Field Manipulation: When a voltage is applied across the deflection plates, it creates an electric field between them. This field exerts a force on the moving electrons in the beam, causing them to deflect.
* Controlling the Beam: By changing the voltage applied to the deflection plates, you can change the strength and direction of the electric field, which in turn controls the direction of the electron beam.
Essentially, the electric fields act like invisible "steering wheels" for the electron beam, allowing it to trace out the desired image on the screen.
Note: Modern displays, such as LCD and OLED screens, do not use CRT technology and rely on different mechanisms for image formation.
