Question

Light pen works on which principle

Answer 1

Answer:

A light pen is a pointing device. It is used to select a displayed menu option on the Cathode Ray Tube (CRT). It is a photosensitive pen-like device. It is capable of sensing a position on the CRT screen when its tip touches the screen. When its tip is moved. over the screen surface, its photocell sensing element detects the light coming from the screen and the corresponding signals are sent to the processor.

A light pen can also be used for graphics work. A user can draw directly on the CRT screen with the light pen if the computer system is provided with Computer Aided Design (CAD) package.

Answer 2

Answer:

light pen works on which principle.

Explanation:

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