Observation consists of receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments. Any data recorded during an experiment can be called an observation.bservation consists of receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments. Any data recorded during an experiment can be called an observation.
A barcode scanner is a device that is used to read the printed barcodes. A barcode consists of a series of parallel, adjacent bars and spaces that are decoded with the intensity of the light reflected by them. When the scanning is initialized, the scanner lens reads the entire code with the help of the light source and converts the code into 0s and 1s.
a bar code often seen as a single word barcode is the small image of lines bars and spaces that is affixed to retail store items identification cards and postal mail to identify a particular product number person or location barcode reader is used to read the code the reader uses a laser beam that is sensitive to the reflections from the line and space thickness and variation