FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -An optical disk drive uses a laser beam to read the data from the disk as it is spinning.

Detailed explanation-2: -Blu-ray. The Blu-ray disk has emerged as clear leader in today’s optical storage market. Unlike CDs and DVDs, which use a red laser to read and write data, a Blu-ray disk uses a blue laser, which dramatically increases capacities and data transfer rates over CDs and DVDs.

Detailed explanation-3: -CD data is stored as a series of tiny indentations (pits), encoded in a tightly packed spiral track of pits moulded into the top of the polycarbonate layer. The areas between pits are known as ‘lands’.

Detailed explanation-4: -The optical disc makes use of laser technology: digital data are recorded by burning a series of microscopic holes, or pits, with a laser beam into thin metallic film on the surface of a 43/4-inch (12-centimetre) plastic…