Cathode Ray Tubes

 


How a Cathode Ray Tube (CRT) Works?

When an electron absorbs electric energy, it moves further out away from the nucleus, thereby gaining potential energy (similar to throwing a ball up in the air). As the electron falls back down to its ground state (closer to the nucleus) it loses that potential energy, which is converted into kinetic energy in the form of electromagnetic radiation (some of which can be visible light).