what does a light pen resemble with
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A light pen is like a magic wand. It resembles a regular pen in size and shape, and has a cord that plugs into the computer. When you point it at the screen and activate it (either by pressing a switch on the pen itself or a key on the keyboard), it responds to whatever software you're running...
A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (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.
Light Pen (similar to the pen) is a pointing device which is used to select a displayed menu item or draw pictures on the monitor screen. It consists of a photocell and an optical system placed in a small tube....
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