Here is a good diagram from Compton's Interactive Encyclopedia.
The television has two major sections. One is very much like a radio, it receives a picture and sound through an antenna or through your cable or VCR. The signals that are received are converted into a picture.
The device that shows the picture is a big glass tube like a huge light bulb. It's called the picture tube. The original picture tube was quite simple and it's name was the cathode ray tube or CRT.
The picture is actually made by a bright dot that zigzags back and forth, top to bottom on the screen. As the dot moves, it gets brighter or darker depending on the picture. You eye doesn't see just one dot becuase it moves so fast.
Sometime when you watch TV, move your hand quickly in from of your eyes and you may see the effect of this dot causing your hand to look like it's grown a few extra fingers!
Answer #% % filename A154.DOC page% % page 1 of% % numpages 1 % % date \@ "MMMM d, yyyy"November 18, 1997
€ DOC Elizabeth Lucas, Chaya Porter, room 12, Mrs. Mastine
Rose Rebecca, Bobby, room 11, Mrs. Pottery