Which of the following is an input device that utilises a light-sensitive detector to select objects on a display screen?

Options

A. Light pen
B. Bar code reader
C. Optical mark recognition
D. Magnetic ink character recognition

Answer

A

Explanation

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 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.