Logg på
Computer Science for IGCSE & O level - Hardware (Section 4 - No. 1)
What type of light activates the barcode scanner?
Red laser
Infrared light
Green light
Ultraviolet light
Forklaring
a red laser or LED is used in barcode scanners.
Kommentarer (0)
Logg inn for å kommentere
Annonse
Tillat at javascript laster denne siden ordentlig
