Question

How does a cathode ray tube (CRT) display work?

a.

It uses liquid crystals to form images.

b.

It emits a stream of electrons that is directed by magnetic fields to hit a phosphor-coated screen, causing the phosphor to glow.

c.

It uses light-emitting diodes to form images.

d.

It utilizes plasma technology to create images.

Posted under Human Computer Interaction

Answer: (b).It emits a stream of electrons that is directed by magnetic fields to hit a phosphor-coated screen, causing the phosphor to glow. Explanation:A cathode ray tube (CRT) display works by emitting a stream of electrons from an electron gun. This stream is then directed by magnetic fields to hit a phosphor-coated screen. The phosphor gets excited by the electrons and emits light, or glows. The electron beam is scanned across the screen, creating an image.

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