Question:

$($a$)$ For a fixed position Bar$-$Code Scanner, briefly explain the following

terms:

$($i$)$ Scan width.

$($ii$)$ Focal distance.

$($iii$)$ Depth of field.

$($c$)$ Explain the operation of a RFID tracking system for parts storage.

$($d$)$ Explain the benefits of RFID Tags over barcodes.