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A light pen is a pointing device that allows users to interact with a computer screen by detecting light generated by the screen. It was commonly used in the past for drawing, selecting items, and entering data directly on the screen.

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Q: What is the purpose of light pen?
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What does a light pen contain?

A light pen typically contains a light sensor that detects light emitted from a computer screen. When the pen is pressed against the screen, the sensor registers the light and communicates with the computer to determine the pen's position on the screen.


Is a light pen mechanical or optical device?

A light pen is an optical device that detects light emitted by a computer screen to determine the position of the pen on the screen. It is used as an input device to interact with computers by pointing, clicking, and drawing on the screen.


How a light pen works?

A light pen works by detecting light emitted by a computer monitor or screen when the pen's tip touches the surface. The pen has a light-sensitive photodiode at the tip, which detects the light and sends a signal back to the computer to identify the pen's position on the screen. This allows users to interact with software by pointing and selecting on the screen.


How does lightpen work?

A light pen operates by detecting the light emitted from a computer screen when activated by a user pressing the pen against the screen. The screen emits electron beams that are picked up by the light pen, allowing the computer to determine the location on the screen that the pen is pointing at.


What is the disadvantage of the light pen?

One disadvantage of a light pen is that it requires a display with a special coating to detect the light emitted by the pen accurately. Additionally, it can be less precise than other input devices like a mouse or stylus.

Related questions

What is another name for the light pen?

a pen light :)


What are the functions of the light pen?

function of light pen


Is a light pen a input or output?

Light Pen is an input Device.


Is a light pen a input output?

Light Pen is an input Device.


What was the purpose for the Alamo's stock pen?

No one knows what the purpose for the stock pen, theories are that the stock pen was used for extra guns,gun powder etc.


What does a light pen contain?

A light pen typically contains a light sensor that detects light emitted from a computer screen. When the pen is pressed against the screen, the sensor registers the light and communicates with the computer to determine the pen's position on the screen.


What are the uses of light pen?

The light pen is used to draw objects on a CRT computer screen. They are also used to display objects over computer devices.


What is the purpose of having a pen pal?

The purpose of having a pen pal is a way for one to get to know how someone lives and thinks. Pen pals in foreign countries are a good way to get to know the culture of the pen pal's country. Many people have the same pen pals throughout their lives.


What is the purpose of each part of the pen?

to write.


Output device used to draw building plans?

Mouse or light pen


Is a light pen mechanical or optical device?

A light pen is an optical device that detects light emitted by a computer screen to determine the position of the pen on the screen. It is used as an input device to interact with computers by pointing, clicking, and drawing on the screen.


How a light pen works?

A light pen works by detecting light emitted by a computer monitor or screen when the pen's tip touches the surface. The pen has a light-sensitive photodiode at the tip, which detects the light and sends a signal back to the computer to identify the pen's position on the screen. This allows users to interact with software by pointing and selecting on the screen.