state one difference between VDU and printer
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Answer:
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Answer:
A monitor is a constantly-refreshing output designed for dynamic images. Monitors refresh themselves at certain rates; if you move a picture 24 times a second it looks like continuing motion to the eye and that’s the standard they use for films. Most cheap monitors refresh at at least twice that rate.
A printer, on the other hand, is a device that builds one static image and captures it permanently on a suitable medium, paper being the most common. Once done, the image on the paper does not refresh, and does not move. It remains the same at any two points in time.
They’re both output devices. Many printers these days come with a scanner built-on. The printer is still an output device, the scanner an input. Considered as a whole, integrated units are an input/output device.
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