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Input devices
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Total cards: 3•Content version: v3•Public deck•Updated: 8/1/2026
Card preview (3)
#1
Front (Question)
Scanning a barcode
Back (Answer)
Shines a laser onto the barcode and the barcode reflects the white spaces back. Photoelectric cells detect the reflected light and convert it to digital data which can be read by a computer.
#2
Front (Question)
How does a mouse work?
Back (Answer)
A red LED light is reflected off a surface and any movements are detected be a sensor made up of an array of photo-sensitive diodes
#3
Front (Question)
What is an input device?
Back (Answer)
Transfer of data from outside a computer to its main memory.