What is use of 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 drawon the screen in a similar way to a touchscreen but with greaterpositional accuracy.
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It is a pointing device used to draw lines or images directly on the screen. by using it you can move the pointer and select object on the screen by directly pointing to them.
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