to remote areas. Figure . Optical fibers Applications Optical fiber system has a number of applications namely, international communication, inter-city communication, data links, plant and traffic control and defense applications. Merits i) Fiber cables are very thin and weigh less than copper cables.
ii) This system has much larger band width. This means that its information carrying capacity is larger. iii) Fiber optic system is immune to electrical interferences. iv) Fiber optic cables are cheaper than copper cables.
Demerits i) Fiber optic cables are more fragile when compared to copper wires. ii) It is an expensive technology. . .
RADAR AND APPLICATIONS Radar basically stands for Radio Detection and Ranging System. It is one of the important applications of communication systems and is mainly used to sense, detect, and locate distant objects like aircraft, ships, spacecraft, etc. The angle, range or velocity of - - - - - - - - Unit electronics and Communication iv) It enables smart classrooms, online availability of notes, monitoring student activities etc. in the field of education.
. . INTERNET Internet is a fast growing technology in the field of communication system with multifaceted tools. It provides new ways and means to interact and connect with people.
Internet is the largest computer network recognized globally that connects millions of people through computers. It finds extensive applications in all walks of life. Applications: i) Search engine: The search engine is basically a web-based service tool used to search for information on World Wide Web. ii) Communication: It helps millions of people to connect with the use of social networking: emails, instant messaging services and social networking tools.
iii) E-Commerce: Buying and selling of goods and services, transfer of funds are done over an electronic network. Figure . Mobile communication It provides the facility of roaming – that is, the user may move from one place to another without the need of compromising on the communication. The maintenance and cost of installation of this communication network are also cheap.
Applications i) It is used for personal communication and cellular phones offer voice and data