what is the use of uses of light pen? discuss main points.
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»»The light pen is often used in computers as an input device. When applied in a small laboratory computer, which also serves as a pulse height analyser, it facilitates considerably the processing of the results of measure- mentsl'2).
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A light pen is a computer input device in a form of
light- sensitive ward used in conjunction with the computer's cathode- ray tube (CRT) display. It allows the user to displayed objects or draw on the screen in a similar way to touchscreen but great positional accuracy.
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