Light guns are specialized input devices used primarily in video games, designed to detect light emitted from a screen. They work by sensing the light from the screen when the player pulls the trigger, allowing for interactive shooting games. These devices are commonly associated with arcade games and home consoles, providing a more immersive gaming experience. The technology behind light guns typically involves a photodiode that detects the light from the screen. When the trigger is pulled, the gun registers the position of the light, determining whether the target has been hit. Popular examples of games that utilize light guns include Duck Hunt and Time Crisis.