Cathode Ray Tubes

Cathode Ray Tube

A Cathode Ray Tube or CRT is a Vacummtube having Electron Guns and phosphorescent screen
which the user sees. CRT is also called as Picture Tube and was found in all devices until invention of LCD.
CRT has the following components which will help you to grasp the concept quickly.

• A Cathode:  Which acts as terminal where electrons enter the tube.
• Vacummtube: Which is an electron tube consisting of sealed glass.(Air is withdrawn from the tube)
• A Cathode ray: Which is a Stream of Electrons.

CRTs were invented as scanning devices by German scientist Karl Ferdinand Braun in 1897.

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