COMPUTER FUNDAMENTALS

Detailed explanation-1: -An optical mouse is an computer pointing device that uses a light-emitting diode an optical sensor, and digital signal processing ( DSP ). This mouse doesn’t have mouse ball and electromechanical transducer.

Detailed explanation-2: -Answer. A mouse, if it is a mechanical mouse, uses a ball and rollers, and an optical mouse uses a laser or LED. These parts allow the mouse to track the movement on an x-axis and y-axis directions and move the mouse cursor on the screen.

Detailed explanation-3: -Trackball. A trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axis, similar to an upside-down mouse: as the user rolls the ball with a thumb, fingers, or palm the pointer on the screen will also move.

Detailed explanation-4: -An input device used to move the pointer (cursor) on screen. The major pointing device is the mouse for the desktop computer and the touchpad for the laptop, although many road warriors bring along a mouse. Pointing sticks are available on some laptops, and a small number of users prefer trackballs over the mouse.