One of the purposes of man is to communicate among themselves. For the Natural Sciences with its technology, has donated to us all, such as print media, telegraphy, telephone, radio, and television.
In 1962, the world was startled by the discovery of a new form of TV and radio broadcasts through outer space, or specifically via an artificial satellite. With communications via satellite is the relationship between human beings around the world is becoming increasingly easy.
Below is the development of world communications, among others:
1. Printing
Printing as a means of communication between humans is very important. Since the beginning of the 15th century printing has been used by people as a means of mass communication, namely in the newspaper. With this print mass media, a story known by many people in a short time, although its spread is still dependent on the means of transport available at that time.
2. Telegraphy
A record of history shows that telegraphy had been found of people since the 18th century. Gradually become more perfect the technique so that by the mid-19th century telegraphy network has reached the plains of Europe and North America. Telegraphy advantage is that people can communicate over long distances up to hundreds of thousands of kilometers in just one or two minutes.
3. Phone
Phone found one not long after telegraphy, precisely in 1876 AD by Bell. The advantages of telegraphy telephone with person’s phone are able to speak directly and receive answers as speech or like people talking to each other. While a person can only transmit telegraphy signs that must be translated in advance.
4. Radio
In telegraphy and telephone wires are always used antartempat coupling, while the radio can send and receive messages without using wires. The messages are emitted into the air. So people can communicate with ships sailing on the ocean. Marconi (1896) considered the inventor of radio telegraph.
5. Cinema or Picture of Life
One of the tools of mass communication that is very impressive and important for human life is a picture of life. Cinema is not only able to present a picture, but pictures that can move or live well with his voice so that the message being communicated to be complete.
6. TV
The findings are very amazing in the 20th century is television. With the television people can transmit live images and sound. Said to be amazing because even now not many people can understand how the live images can be transmitted through electrical Kable, it can even also without going through the wire. But clearly the presence of television, people get great benefits for the welfare of his life. With the TV people can send and receive news with the impression that a complete (sound and live images). With the TV people can obtain quality entertainment, controlled, and inexpensive; with the TV people can improve the quality and quantity of education. We believe there are so many advantages to be gained with this TV.
7. Satellite Communications
The first surprise happened in 1962 with the radio and television broadcasts can be received in the same time all over the world, which are separated by the Atlantic, namely Europe and the United States. With the possibility of reception of radio and television broadcasts to the entire face of this earth, there will be major changes in the development of society caused by the rapid cultural exchanges. Rapid dissemination of knowledge facilitate mutual understanding among people around the world to be great. The above happens with the help of communication satellites that will transmit radio waves and television broadcasts, as well as other communication tools.
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