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In simple terms, it shines light at what it is scanning and darker areas reflect less light back, enabling it to detect where there are markings, and so it can determine what is on whatever it is scanning and produce an image.

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8y ago

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Related Questions

Is a scanner a input device?

Yes, a scanner is AN input device.


Simple definition of scanner?

a scanner is an input device which is used to converet image into digital form


Which input device can be used to reproduce a word document?

scanner


Which devices are used to input data in form of images?

A scanner.


Is a scanner is a input or an output?

A scanner is an input device, like a microphone. You cannot send data from your computer to the scanner, only from the scanner to the computer.


Can scanner be used as an input or output device?

Scanners can only be used as an input device. They scan the image placed inside/ontop and digitalise it and display it on your computer screen. The only type of scanner that can output is an "all-in-one" scanner/printer that can print out the images you scan in or other images from your PC, but that is not technically a scanner, it is a scanner, printer combination. So no, Scanners can only be used as input devices.


Is an scanner an input or output device?

A scanner is an input device because it sends (or 'inputs') information to the computer.


are scanner an input or output?

Scanner is a input device. Printer is one of the output device. All like keyboard, scanner, mouse are input devices.


Is an scanner an output device?

No, it is an input. The data goes in to the computer from the scanner, not out of the computer to the scanner.


Is Scanner is an Outputdevice?

No, a scanner is an input device.


Is an scanner a imput or output?

A scanner is an input device because you cannot send data from your computer to the scanner, only from the scanner to the computer.


Is a scanner an input and output device?

Input