Television is one of the many wonder science and technology, it was invented in England by the Scottish scientist J.N. Baird in 1928 and the British Broadcasting Corporation was the first to broadcast television images in 1929. Previously the radio helped us hear things from far and near, spread information and knowledge from one corner of the globe to another. But all this was done through sound only. But television combined visual images with sound. Today we can watch games, shows and song and dance programmes from all corners of the world. While sitting at our own homes. TV can be used for educating the masses, for bringing to us latest pieces of information audio-visually and can provide us all kinds of entertainment even in colour. But as in all things, too much of televiewing may prove harmful. In many cases the habit of watching TV has an adverse effect on the study habits of the young. When we read books, we have to use our intelligence and imagination. But in most cases TV watching is a passive thing. It may dull our imagination and intelligence.
THE USES OF COMPUTERS
The computer is one of the marvels of modern science. Its origin may be traced to the mechanical calculating machine that was invented by Charles Babbage, and English mathematician, in 1834. The machine could not fully realize the purpose that Babbage had in mind, because of the inadequate engineering skill of the time. Today’s computers are electronic. A computer can work very fast because it runs on a small current of electricity that flows at a very high speed. With the help of stored information and data it can do calculations of very large figures within a very short time. Within seconds a computer can add, subtract, multiply and divide very large figures within a very short time. Within seconds a computer can add, subtract, multiply and divide very large figures. Such calculations would take even an expert mathematician a much longer time to complete. Today computers are used widely in all advanced countries in data processing which means compilation. Correlation and selection of facts. In all fields of research and industry and business the use of computers is constantly on the rise. There are two types of computers: digital and analogue. The first processes information numerically, the latter provides information in terms of quantity rather than by numerical counting. But computers can do their work only when series of clearly defined information are fed into them, which is known as programming. For this a specialised programming language is necessary. The benefits of computers are many. They economise time, speed up work, save labour and in the long run reduce costs. In all advanced countries they are used in educational institutions, industries, research laboratories, government departments and so on. In space-research they are of great importance. In India computers are gradually being introduced to facilitate work in different fields, but no to the required extent. There is strong opposition to the wider introduction of its use because many empoloyees in private and public sectors fear that use of computers may lead to large scale unemployment in a country that is already plagued by this problem.