Question

write a short note on-barcode reader 2 or 3 lines​​

Answer 1

Answer: hope it helps

Explanation:

A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals.

Answer 2

Answer:

A bar code reader (or barcode scanner) is an optical scanner that can read printed bar codes, decode the data contained in the bar code and send the data to a computer.

It consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals. Additionally, nearly all bar code readers contain decoder circuitry that can analyse the bar code's image data provided by the sensor and sending the bar code's content to the scanner's output port.