X. Match the two halves and make sentences:

A

1. To prove the existence of electromagnetic waves,

2. The radar set can perform scanning of an area

3. As the apparatus was intended for receiving signals,

4. He provided the receiver with an antenna

5. Commercial companies of other countries wanted to make Popov

6. He was the first to use the results obtained

7. As the new device had failed under test,

8. It has been installed in the plant

9. In our laboratory we deal with materials

10. Popov made his new device serve two purposes:

B

a) the designer was made to investigate what had caused it to fail

b) which can withstand high temperatures

c) by Hertz

d) sell his receiver

e) it was built for

f) Hertz made many experiments

g) by a beam of microwaves

h) to send signals and to record the received signals

i) it was called the receiver

j) to increase its range

Language in use

XI. Here are the answers; work out the questions:

1. in 1859

2. Yes, the contemporary theories were known to Popov

3. in 1895

4. to prove the possibility of radio communication

5. Admiral Makarov

6. three years later

7. during World War II

XII. Arrange the words in the correct order to make sentences:

1. was/ ago/ some/ This/ years/ problem/ solved

2. can/ in/ this/ library/ on/ every/ subject/ be/ Books/ found

3. to carry out/ physics/ him/ the field/ We/ in/ know/ research/ of

4. subjects/ general/ must/ very/ engineering/ work/ Students/ much/ at the

5. electrical/ began/ aeronautics/ than/ The development/ of/ that/ engineering/ earlier/ of

Writing

XIII. Write a composition about an eminent inventor (about 120 words) using the following word combinations:

some words about; was born in; one of the prominent inventors; graduated from; carried out a lot of experiments; were devoted to; of great importance; the results obtained; worked hard; was interested in; didn’t render assistance; well-known in the world

XIV. Write a brief summary of the text in 60-65 words (see Appendix B)

Unit 8. The telephone

Before you start

I. Practise reading and translating the following words:

telephone, communication, telegram, addressed, directly, immediately, vibrate, wavelength, vibration, diaphragm, instrument, magnetized, microphone, carbon, mouthpiece, granules, current, varying, electro-magnet, exchange, automatically, delay, reached, iron, wire, sensitive, battery

II. Arrange the following words in pairs of antonyms:

A

conductor, before, solid, alternating, early, receiver, advantage, new, light, increase, much, long, take, effective, include, similar, high, fast

B

old, little, decrease, slowly, disadvantage, ineffective, insulator, low, after, short, exclude, liquid, heavy, give, direct, transmitting, late, different

Reading

III. Before reading the text try to answer the questions that follow:

1. What do you know about the invention of telephone?

2. Why is the telephone a better means of communication than the telegraph?

3. What are the uses of mobile phones?

IV. Read the text and explain the underlined parts in your own words: