A LASER melts small holes in a layer of tantalum metal inside the disk.
David Gregg was the inventor of the optical disk.
optical
use a laser to read and write data. Optical disks have very large storage capacity but they are not fast as hard disks. There are three basic types of optical disks: CD-ROM, WORM and erasable. DVD-ROM is higher- capacity disc
An Optical Disk
it is a CD(Compact Disk) and a DVD (Digital Video Disk)
Optical Disk
no,harddisk is not an optical storage
an optical disk which stores data optically
A sector
Optical disk
optical disk storage are read only so they cannot get infected. But if you burn files which are infected by viruses then the optical disks can spread the virus
(a)- it is a read-only storage medium. Data once recorded, cannot be erased, and hence the optical disk cannot be reused. (b)- thd data access speed for optical disk is slower than magnetic disks; (c)- optical disk require a more complicated drive mechanism that magnetic disk.