As the electrons travel towards the front of the tube, they pass through a series of focusing and deflection coils. The focusing coils are used to adjust the width and height of the electron beam, while the deflection coils are used to move the beam horizontally and vertically. This allows the electron beam to be precisely controlled and directed towards specific points on the screen.
When the electron beam hits the front of the tube, it strikes a phosphor-coated screen. The phosphor coating is made up of tiny particles that emit light when they are struck by electrons. The amount of light emitted depends on the energy of the electrons, so the brighter areas of the screen correspond to areas where the electron beam is more intense.
The image on the screen is created by scanning the electron beam across the screen from left to right and from top to bottom. The electron beam is turned on and off as it moves across the screen, and the brightness of the beam is controlled by the video signal. This causes the phosphor coating to emit light and create the image that we see on the screen.