All Optical media (CD, DVD, Blu-Ray etc.) have pits and lands. These are microscopic and represent the binary information of the data stored on the disc. A land is reflective and reflects the laser into a sensor to register it as a I, but when the light hits a pit, it shatters and no reflection is received, thus a O is registered. There is much confusion as to which is a pit and which is a land, even some professional texts get it wrong, but this is the way I was educated.
Lands
Flats, or lands.
Pits and lands
Pits and lands
The recessed area on a CD or DVD where data is stored. CDs and DVDs store data in lands and pits. The lands represent 1 and the pits represent 0 in binary computing. The bits are read by the disc drive that uses a laser beam to distinguish between the lands and pits based on the amount of scattering or deflection that occurs when the beam of light hits the surface of the disc
Walnut Creek CDROM ended in 2000.
Walnut Creek CDROM was created in 1991.
dual layer means there are layers of pits and lands on the dvd
optical discs
Optical Storage Medium
A CDROM is a disc that contains data and computer software like video gaming. Computers can read the CDROM it is a read only memory and cannot be written on.
1970