picture tube [2]![click to hear](/images/speaker.jpg)
Hollow glass tube in which video signals are converted into electron beams to produce pictures on the screen.
protective window ![click to hear](/images/speaker.jpg)
Front portion of the picture tube that covers the screen.
base ![click to hear](/images/speaker.jpg)
Terminal end of the picture tube that connects to outside circuits.
screen ![click to hear](/images/speaker.jpg)
Surface on which pictures are formed; it is covered with sensitive dots, which emit red, green or blue light when hit by electrons.
color selection filter ![click to hear](/images/speaker.jpg)
Perforated metal plate that directs each electron beam toward the sensitive parts of the screen corresponding to its color.
electron beam ![click to hear](/images/speaker.jpg)
All the negatively charged particles traveling in the same direction; their intensity varies with the video signal received.
neck ![click to hear](/images/speaker.jpg)
Narrow part of the picture tube that contains the electron gun.
electron gun ![click to hear](/images/speaker.jpg)
Device that emits electron beams toward the screen; there are beams for each of the primary colors, red, green and blue.
funnel ![click to hear](/images/speaker.jpg)
Flared rear portion of the picture tube.