what is what are the main advantages of light pen?Advertisement
Uses of Light Pens. A light pen, sometimes called a book light, is a small device that resembles a writing utensil that transmits a beam of light. Its compact size makes it convenient for taking along with you just about anywhere. It's an ideal substitute for a lamp, which illuminates most of ... - read more
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. - read more
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