A) Polarized light
B) Coloured light
C) Unpolarized Concentric Light
D) Laser
E) Electric light
Correct Answer: D
Solution :
[d] In optical-storage technology, a laser beam encodes digital data onto an optical, or laser, disk in the form of tiny pits arranged in concentric tracks on the disk's surface. A low-power laser scanner is used to "read" these pits. With variations in the intensity of reflected light from the pits being converted into electric signals. This technology is used in the compact disc; CD-ROM (compact disc read-only memory); WORM (write-once read-many), etc.
You need to login to perform this action.
You will be redirected in
3 sec
