Laboratory work 7

Ex. I. Listen and repeat the following words and word-groups, translate them into Russian:

1. means of communication; 23. a straight line;

2. between distant points; 24. from the centre of a circle;

3. electromagnetic radiation; 25. to any point on its circumference;

4. to forecast; 26. the technique;

5. theoretically; 27. a sound;

6. to demonstrate; 28. image;

7. practically; 29. to affect;

8. similar; 30. to pass;

9. the waves of light; 31. to interpret;

10. to travel at the same speed; 32. to carry;

11. through free space; 33. in many branches of life;

12. the earth; 34. medicine;

13. transmission; 35. biology;

14. reception; 36. metallurgy;

15. are connected; 37. astronomy;

16. other direct means; 38. to connect;

17. wireless; 39. for many years;

18. to emanate; 40. to exist;

19. the beams of light; 41. telegraphy; telegraph;

20. in all directions; 42. telephony; telephone;

21. the radius; 43. broadcasting;

22. Latin; 44. for various purposes.

Ex. II. Listen to the text.

Ex. III. Answer the following questions:

1. Is radio a means of communication?

2. What speed do radio waves travel at?

3. What is «radius»?

4. What currents does radio deal with?

5. Where is radio used?

Ex. IV. Form Participle II of the following verbs and translate them:

1. to carry 5. to forecast; 8. to propagate; 11. to send; 14. to affect;

2. to call 6. to demonstrate; 9. to receive; 12. to name; 15. to interpret;

3. to make 7. to transmit; 10. to connect; 13. to emanate; 16. to deal with.

4. to use

Ex. V. Translate into Russian paying attention to Participle II;

1. The applied method was very useful for the experimental work.

2. The information received is of importance.

3. Radio waves were forecasted theoretically.

4. Radio devices will be used for various purposes.

5. The results received by a group of scientists are discussed at the conference.

Ex. VI. Make the following sentences negative and interrogative as in the Model:

This kind of communication is called radio.

This kind of communication is not called radio.

Is this kind of communication called radio?

Now do it yourself:

1. The results of this experiment are demonstrated in the laboratory.

2. These new lenses were received from their radio plant.

3. These devices will be widely used in our industry.

Ex. VII. Say the following sentences in the Past and Future Indefinite Tenses as in the Model:

Signals are carried by electromagnetic radiation.

Signals were carried by electromagnetic radiation.

Signals will be carried by electromagnetic radiation.

Now do it yourself:

1. High and low frequency currents are used in radio.

2. Radio and electronics are naturally connected.

Ex. VIII. Use the following sentences in the Passive Voice as in the Model:

Radio uses an electrical energy to transmit sounds.

An electrical energy is used by radio to transmit sounds.

Now do it yourself:

1. The receiving stations receive radio waves.

2. Our scientists demonstrated radio waves practically.

3. We shall apply the radio equipment for various purposes.

Ex. IX. Use the following sentences in the Active Voice as in the Model:

Radio parts are affected by the passing radio waves. The passing radio waves affect radio parts.

Now do it yourself:

1. The signals carried by radio waves are interpreted by the radio parts.

2. These waves were emanated by the transmitting stations.

3. Radio will be used by us in different branches of our national economy.

Ex. X. Say if you agree or not to the following statements using correspondingly: you are right — верно, you are not quite right — неверно.

1. Electromagnetic radiation used is generally called radio.

2. Radio was invented by Yablochkov.

3. Radio and electronics are not connected.

4. Radio and TV are the greatest wonders of our time.

5. Different radio devices will be applied for many purposes.

Ex. XI. Translate into English:

1. Радио было изобретено великим русским ученым Поповым.

2. Радио как средство связи очень важно во всех сферах жизни.

3. Радиоволны передаются радиопередатчиками и принимаются радиоприемниками.

4. Для какой цели будут использовать этот прибор?