India Exam Junction
[Clerk (Evening) Dec, 2021]
4. What is a light pen?
A Mechanical input device
Optical input device
Electronic input device
Optical output device
Correct Answer :
Optical input device
Solution
A light pen is an optical input device that allows users to interact with a computer screen. It detects the light from the monitor to perform functions like drawing, selecting, or pointing to elements on the screen. It works similarly to a stylus but is specifically used for screens that emit light.