Which of the following types of computer monitor uses an electron beam to form an image on the screen?

Correct option is C

The Cathode Ray Tube (CRT) monitor uses a focused electron beam that scans the inside of the screen to illuminate phosphor dots and produce images. This technology was widely used in older televisions and computer monitors before flat-panel displays became popular.

Important Key Points:

1. CRT monitors use electron guns to shoot beams across the screen.
2. The screen is coated with phosphor, which glows when hit by the beam.
3. CRTs offer excellent color accuracy and refresh rates but are bulky and power-hungry.

Knowledge Booster:

• LED (Light Emitting Diode) monitors use LED backlighting but not electron beams.
• LCD (Liquid Crystal Display) uses liquid crystals and a backlight, not electron guns.
• Gas plasma displays use electrically charged gases, not electron beams, to display images.