telephone

What do you mean by telephone? Who invented it?

The apparatus with the help of which a person can talk to another living at a distance known as telephone. A man named Graham Bell invented it.

Who was Marconi? Write a short note on his achievements.

Marconi is the inventor of wireless telegraphy. He invented it in 1899 A.D. Hesucceeded in sending wireless messages across the Pacific Ocean in 1901 A.D.

What is radio? How was it invented?

Radio is a receiving set for sound transmitted by air waves. It was predicted by James Maxwell in 1865 in England. Further improvements were made by Edison.

What do you understand by mass media? What are the main means of mass media?

 The means which help in the formation of public opinion are known as mass media.The main means of mass media are press,radio,television and cinema.

Give an account of the press as one of the means of mass media?

Ans:-Press or newspapers are the most important means of mass media for organizing public opinion.The newspapers give information about the national and international events,various political thoughts and ideas and programmes and policies of the  to form public opinion on various matters.

Describe briefly the importance of radio as a means of mass media?

The radio is the cheapest and the most effective means of communicating ideas on current affairs to the large population of the world.Millions of people daily listen to the latest news of the world through radio.It makes the listener think of what is happening in the world through radioIt teaches its listener think many good ideas and views.So it is highly useful for mass education.