COMPUTER FUNDAMENTALS

Detailed explanation-1: -A scanner illuminates the code with a red light to “scan” the black and white elements of a barcode. Then, the code converts into matching text. The decoder analyses the image data and sends the information to the output port.

Detailed explanation-2: -A barcode reader works by directing a beam of light across the barcode and measuring the amount and pattern of the light that is reflected. The scanner converts the light energy into electrical energy, which is then converted into data by the decoder and forwarded to a computer.

Detailed explanation-3: -Infrared rays are electromagnetic radiation with wavelengths longer than those of visible light. They are commonly used in barcode scanners as they are easy and convenient to use.

Detailed explanation-4: -Scanners read barcodes best when the background reflects light and the bars don’t reflect any. Scanners have a hard time picking up yellow and red colors because they can’t “see” those colors, but black and blue based colors are much easier for a scanner to pick up.