Question

A ____ scans the entire screen one pixel at a time

Answer 1

Answer:

Explanation:

No such technology is invented till date that scans the entire screen one pixel at a time

Answer 2

A CRT scans the entire screen one pixel at a time.

What is a CRT scan?

• CRT means cathode-ray tube.
• A light pen is a computer input device in the form of a light-sensitive wand that is used in conjunction with a computer's cathode-ray tube (CRT) display.
• It is similar to a touchscreen in that it allows the user to point to displayed objects or draw on the screen, but with greater positional accuracy.
• When scanned by a cathode-ray tube electron beam, a light pen detects changes in the brightness of nearby screen pixels and communicates the timing of this event to the computer.
• Because a CRT scans the entire screen one pixel at a time, the computer can track the expected time of scanning various locations on the screen by the beam and infer the pen's position from the most recent timestamp.

Hence, a CRT scans the entire screen, pixel by pixel.

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