How does an optical disk operate?

O Uses a laser, guided by a lens, to read and write o A rotational mechanism will spin the disk o To write power lens engravees disk with pits and labds correspinding to 1s and 0s o Reading: Done by photodiodes detect the light reflected from the disk by a less powerful lens, this will be different due to the grooves reflecting light differently, and interpret this as 1s or 0s