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picture tube ![click to hear : picture tube click to hear : picture tube](../../../images/speaker-vert.gif)
Hollow glass tube in which video signals are converted into electron beams to produce pictures on the screen.
screen ![click to hear : screen click to hear : screen](../../../images/speaker-vert.gif)
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 : color selection filter click to hear : color selection filter](../../../images/speaker-vert.gif)
Perforated metal plate that directs each electron beam toward the sensitive parts of the screen corresponding to its color.
protective window ![click to hear : protective window click to hear : protective window](../../../images/speaker-vert.gif)
Front portion of the picture tube that covers the screen.
electron beam ![click to hear : electron beam click to hear : electron beam](../../../images/speaker-vert.gif)
All the negatively charged particles traveling in the same direction; their intensity varies with the video signal received.
neck ![click to hear : neck click to hear : neck](../../../images/speaker-vert.gif)
Narrow part of the picture tube that contains the electron gun.
base ![click to hear : base click to hear : base](../../../images/speaker-vert.gif)
Terminal end of the picture tube that connects to outside circuits.
electron gun ![click to hear : electron gun click to hear : electron gun](../../../images/speaker-vert.gif)
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 : funnel click to hear : funnel](../../../images/speaker-vert.gif)
Flared rear portion of the picture tube.