A pen shaped device which can sense light, and is used to point at spots on a video screen is ____________.
A pen shaped device which can sense light, and is used to point at spots on a video screen is ____________.
The correct option is B Light pen
A Light pen shaped device which can sense light, and is
used to point at spots on a video screen.
A light pen is a computer input device in the form of a
light-sensitive wand used in conjunction with a computer's CRT display. It
allows the user to point to displayed objects or draw on the screen in a
similar way to a touchscreen but with greater positional accuracy. A light pen
can work with any CRT-based display, but its ability to be used with LCDs was
unclear.
A pointing device is an input interface that allows a
user to input spatial data to a computer. CAD systems and graphical user
interfaces (GUI) allow the user to control and provide data to the computer
using physical gestures by moving a hand-held mouse or similar device across
the surface of the physical desktop and activating switches on the mouse.
Movements of the pointing device are echoed on the screen by movements of the
pointer (or cursor) and other visual changes.
A Light pen shaped device which can sense light, and is used to point at spots on a video screen.
A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's CRT display. It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy. A light pen can work with any CRT-based display, but its ability to be used with LCDs was unclear.
A pointing device is an input interface that allows a user to input spatial data to a computer. CAD systems and graphical user interfaces (GUI) allow the user to control and provide data to the computer using physical gestures by moving a hand-held mouse or similar device across the surface of the physical desktop and activating switches on the mouse. Movements of the pointing device are echoed on the screen by movements of the pointer (or cursor) and other visual changes.
