Question

The highest data rate is provided by transmission medium.
(A) Coaxial cable
(B) Microwave
(C) Optical Fiber
(D) twisted pair

Answer 1

Hint:The main reason behind the new communication system is to enable the transfer of data from transmitter to the receiver at a faster pace. This is determined by the bandwidth of the signal and it means how many frequencies inside such can move. There are different modes of transmission in the starting normal wires which offer a bandwidth of around 750 MHz But, the transmission modes of over air and free space have provided the speed of data transfer.

Complete answer:
Coaxial cables are generally used for cable TV transmission but it is not as fast as compared to the optical fibres. Coaxial cables have an insulating outer jacket surrounded by an insulating layer and then surrounded by a conductive shielding. The optical fibres have revolutionized the transfer of data from one place to another. An optical fiber can provide a bandwidth of more than 100 Ghz and that is a massive improvement from transmission through wires. Optical fibres are used for high speed internet, for radio and TV transmission and for cellular communication.

So, the correct option is C.

Note:Optical fibers use total internal reflection for the transfer of data. The primary condition for total internal reflection is to happen, the signal must travel from optically denser medium to an optically rarer medium. Secondly, the angle of incidence must be greater than the critical angle.