functions of a light pen
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A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT display.
It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy. A light pen can work with any CRT-based display and other display technologies, but its ability to be used with LCDs was unclear (though Toshiba and Hitachi displayed a similar idea at the "Display 2006" show in Japan[1]).
A light pen detects a change of brightness of nearby screen pixels when scanned by cathode ray tube
electron beam and communicates the timing of this event to the
computer. Since a CRT scans the entire screen one pixel at a time, the
computer can keep track of the expected time of scanning various
locations on screen by the beam and infer the pen's position from the
latest timestamp.
A light pen is a peripheral input device, used for
inputting analog information in a digital format.
The "analog" information may be a plan or drawing which needs to be
digitized so that it can be manipulated in a computer program.
An architect for example may use a pen to copy a set of drawing
into he computer so that they can be manipulated in a CAD program.
Hope it helps.
If you like my answer plz mark as brainliest
A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT display.
It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy. A light pen can work with any CRT-based display and other display technologies, but its ability to be used with LCDs was unclear (though Toshiba and Hitachi displayed a similar idea at the "Display 2006" show in Japan[1]).
A light pen detects a change of brightness of nearby screen pixels when scanned by cathode ray tube
electron beam and communicates the timing of this event to the
computer. Since a CRT scans the entire screen one pixel at a time, the
computer can keep track of the expected time of scanning various
locations on screen by the beam and infer the pen's position from the
latest timestamp.
A light pen is a peripheral input device, used for
inputting analog information in a digital format.
The "analog" information may be a plan or drawing which needs to be
digitized so that it can be manipulated in a computer program.
An architect for example may use a pen to copy a set of drawing
into he computer so that they can be manipulated in a CAD program.
Hope it helps.
If you like my answer plz mark as brainliest
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