Lesson 1 Video “The History of Communication”



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Topical Questions
Ex.1 Work with a partner to discuss the following:

a) What methods of communication are you most likely to use? (blogs, Skype, the Internet, social networks, mobile phones)

b) How often do you watch TV?

c) Which are your favourite/least favourite TV channels? Why?

d) What sort of programmes would you limit?

e) What are the good and bad things about television?


Ex. 2 Look at the type of programmes below. Do you find these on TV, on the radio or on both?


documentaries

sports coverage

crime mysteries

travel news




reality shows

cartoons


national news

game shows and quizzes



phone-ins

soap operas

local news


sit coms

adverts


series


Ex.3 Which of the programmes you talked about in exercise 2 would you describe as: 1


1.

informative?


6.

addictive?

2.

controversial?

7.

harmless fun?

3.

influential?

8.

mindless rubbish?

4.

sensational?

9.

usually worth watching?

5.

entertaining?

10.

aimed mainly at men? at women?



Reading and Vocabulary
Ex.4 Look through the following words/word combinations in order to read the text belowi:

  • aerial = antenna ; structure that is used for sending and receiving TV signals

  • amplify = to make stronger (усиливать)

  • beam = ray, line (луч)

  • broadcast = send a television signal

  • browse = to search for information on the Internet

  • cathode-ray tube = object used in television screens  and computers  in which electrons produce an image on the screen (электронно-лучевая трубка)

  • current = the flow of electricity (электрический ток)

  • dish-shaped = form of a bowl (выпуклый)

  • dot = point (точка)

  • emerge = come up , start (появляться)

  • frequency = the number of waves that pass any point in one second (частота)

  • geostationary orbit = a satellite that is in a fixed position above the earth and rotates together with it

  • interfere = get mixed up with (препятствовать, быть помехой)

  • liquid crystal display = screen that uses moving crystals to show a picture

  • narrow = not wide (узкий)

  • relay tower = a structure that receives a signal and sends it to another tower

  • replace = to exchange for something else

  • sheet =layer (слой)

Ex. 5 Read the text and match the headings (1-4) with the gaps (a-d).

1. Television technology

2. Types of Television Sets

3. Benefits of watching TV

4. How television programmes get to the viewers

Television

a) __________________________

Television is one of our world’s most important means of communication.  It shows us information programmes, like the news, documentaries, and sports events. We can watch films, listen to interviews and hear the sounds of events that happen far away. Television teaches us about countries and cultures and we can enjoy entertainment, like series, comedies, game shows or sitcoms.

A television set can be used for other things as well. You can record shows and films for later viewing, play video games, watch DVDs, or even browse the Internet.

Television has been influencing our lives since it was developed over 80 years ago. It is an important way of spending our free time and shapes people’s opinions about various issues.

b) ______________

In order to produce television you need special TV cameras and microphones which capture the video and audio signals.  Three basic colour programmes – red, blue and green can be mixed together to produce any other colour. 

The TV signal is carried by wire to an antenna, which is often on a high mountain or building. The signal is broadcast through the air as an electromagnetic wave.  These waves can travel through the air at the speed of light but not over very long distances.  A good signal can be received up to about a hundred km.

TV stations are given certain frequencies on which they transmit their broadcasts. These frequencies are very high and should not interfere with other signals that travel in the air. In some areas relay towers must amplify the signal and carry it to the next transmitter.

In the last few years digital signals have replaced analog broadcasting. They have many advantages.  Picture quality is better and they can carry more data. TV images can be transmitted in a new quality called high definition (HD).



At home an aerial or satellite dish receives the signals and transforms them to create a picture.



How TV signals are transmitted

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