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In CRT, what is used to produce bright spots when struck by a high-velocity electron beam?

In CRT, what is used to produce bright spots when struck by a high-velocity electron beam? Correct Answer phosphor coated screen

A cathode-ray tube is a vacuum tube containing one or more electron guns, the beams of which are manipulated to display images on a phosphorescent screen.

Parts of the CRT:

1.Electron gun: The electron gun emits electrons and forms them into beam.

2.Deflection plates: these plates are used such that the beam can be positioned anywhere on the screen.

3.Flourescent screen:

  • The screen is coated on the inside, with a fluorescent material called phosphor.
  • The phosphors in a CRT’s screen are the materials that directly produce the photons generated by the CRT. These phosphors are struck by incoming electrons from the electron gun, absorb energy, and then re-emit some or all of that energy in the form of light.

4.Glass tube: The components of CRT are enclosed in an envelope and it allows the electrons to move freely from one end of the tube to other end.

5. Base: Base is provided to the CRT through which the connections are made to the various parts.

 

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