What are the two types of optical disks Discuss their differences and similarities
There are two types of optical disks, which are CD-ROM and DVD. DVD optical disk is quite similar to CD-ROM optical disk as well as a number of key physical differences. ... DVD disk are different from CD-ROM such as pit sizes are half of CD-ROM, track pitch half that for CD-ROM with tighter tolerances, higher mastering speeds both in angular and linear velocity and data rate, two disks substrates to mould per final disk where each half the thickness of a CD-ROM and additional bonding stage which for dual layer disks must be optically transparent and of the correct thickness.