Questions

Optical fiber works on the principle of total internal reflection.

The Total Internal Reflection is the phenomenon in which the complete reflection of a light ray reaching an interface with a less dense medium when the angle of incidence exceeds the critical angle.

The ancient Greek word “bárbaros,” from which it derives, meant “babbler,”.In the Greek ear, speakers of a foreign tongue made unintelligible sounds (“bar bar bar”). Similar words exist in other Indo-European languages, including the Sanskrit “barbara,” which means “stammering.”The word “barbarian” originated in ancient Greece and was initially used to describe all non-Greek-speaking peoples, including Persians, Egyptians, Medes and Phoenicians.

A magnetic disk is a storage device that uses a magnetization process to write, rewrite and access data. It is covered with a magnetic coating and stores data in the form of tracks, spots, and sectors. Hard disks, zip disks, and floppy disks are common examples of magnetic disks.

Hence, Magnetic disks are the most popular medium for both Direct access and Sequential access.