TV Screens My name is Professor Lee, and I'll be showing you the way television and computer screens work. The Big Picture: Learn how the eye forms a single image from a collection of dots, and how television sets use techniques like scanning to "fool" our perception. Black and White TV Screens: This section introduces you to the TV of the ancient past, complete with Beaver Cleaver. Find out about cathode ray tubes and electron beams. Use a magnet to steer an electron beam and watch it affect the picture. Color TV Screens: How many different colors make up your favorite shows? Learn about the different ways that color is mixed, and how your TV makes yellow from red and green. Laptop Screens: Do laptop screens differ from desktop computer screens? Discover how liquid crystal displays use the principle of polarization.

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