How TV Worked (in the old days) What is a cathode? What is a cathode ray? What is a cathode ray tube? What is a phosphor? What are "phosphorescence" and "fluorescence"? How does a "cathode ray tube" CRT work? How was the TV image acquired? What is a "raster" scan? What are horizontal and vertical "sync"? What is "interlace"? Why do that? What determines the "resolution"? What is "gamma" and why should it be corrected? How did they get color? How do decisions made in the 40's affect CG, CV, and IP today?