Computer Science · Input Devices
How does a standard optical barcode reader decode the information contained within a barcode?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1By measuring the magnetic intensity of the ink used in the bars
- 2By transmitting high-frequency radio waves to active microchips
- 3By using light to detect the variation in reflection between bars and spaces✓
- 4By calculating the physical weight and depth of the printed pattern
Correct answer
By using light to detect the variation in reflection between bars and spaces
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