Explain how a CRT functions. What goes on inside the tube to produce waveform displays on the screen?
Some of your students may come across photographs and illustrations of CRTs for use in their presentation. If at all possible, provide a way for individual students to share their visual findings with their classmates, through the use of an overhead projector, computer monitor, or computer projector. Discuss in detail the operation of a CRT with your students, especially noting the electrostatic method of electron beam deflection used to ßteer" the beam to specific areas on the screen.