Because it emits a beam of light - which is detected by a special membrane on the computer screen.
Light pen is a mechanical or optical device? i don't know answer for this
Light sensitive elements
A shock pen is a pen that shocks you when you try to use it
An infrared pen is only a pen shaped holder for someone to apply infrared light (heat) the ease
Durability and AccuracyThe light pen's cord is made of durable industrial armor cable. The working parts of the light pen itself are encased in lightweight metal with an anti-slip coating. The tip is rugged and can take rough handling. The light pen and computer respond instantly when you move it or click on one of the buttons located on the pen's sides. The tip cannot damage the computer screen in any way.FlexibilityIn addition to having the full range of mouse options, including allowing you to drag and drop, you can use the light pen to directly draw or write on the screen. This makes providing your signature relatively simple. You can use light pens on any size CRT (cathode ray tube monitor). You can also use a light pen simultaneously with a mouse. The amount of work space is reduced when you use a light pen instead of a mouse because you do not need a flat surface to operate a light pen.Maintenance and ValueBuying a light pen to use on your CRT computer monitor is cheaper than buying a touch-screen monitor. The same is true for repairs or replacements. A damaged light pen is cheaper to replace than a damaged touch screen. As of 2010, light pens started at about $130 and touch screens started at about $400.The durability of the light pen also makes it economical. While a simple spill can damage your mouse, in most cases it would not phase a light pen. It is easier to keep your CRT computer screen clean if you use a light pen. If you use a touch-screen monitor, you cannot use a light pen and your fingertips will leave smudges from the sweat and natural oils from your skin.
a pen light :)
function of light pen
with the use of a pen light assess for the dilatation of a persons pupils
Light Pen is an input Device.
Light Pen is an input Device.
my guess would be someone who needed to write in the dark
Because it emits a beam of light - which is detected by a special membrane on the computer screen.
You could but grammes would be far more appropriate for an object as light as a pen, as it's better to use fewer decimal places.
The light pen is used to draw objects on a CRT computer screen. They are also used to display objects over computer devices.
Light pen is a mechanical or optical device? i don't know answer for this
Mouse or light pen