III. After-text Exercise

1. Agree or disagree with the next statements:

1) Radiolocation rests on the foundations of ordinary radio theory, and is a technique based on the transmission, reception and interpretation of radiofrequency pulses.

2) The aim of radar is to find a position of a target without respect to a fixed point on the ground.

3) Powerful transmitters send out a stream of radio-waves, called "pulses". These pulses can go through the object.

4) Radio signals called beams are transmitted into the sky from land radio stations at a number of points along aeroplanes course.

5) Powerful radar telescopes are used to study the stars.

2. Find the Information about:

1) finding the position of an aircraft or a ship by means of radio;

2) three quantities which must be measured in order to define the position of an aeroplane or the barrage balloon; 3)using radar by modem ships;

4) guiding aeroplanes by means of radar;

5) other peaceful uses of radar.

3. Put questions to each other.

4. Summarize the general ideas of text Use the following plan:

1) The beginning of the design of a radar.

2) The most elementary radar equipment.

3) The aim of a radar.

4) The principles of radar working.

5) Peaceful purposes of a radar.

5. Translate the following sentences paving attention to the Gerundial Construction:

l) We know of copper having been used as a conductor owing to its suitable characteristics.

2) He objected to the goods being paid in advance.

3) We insisted on their being offered favorable terms of payment.

4) There is no hope of our getting a complete analysis of the measurements within 10 days.

5) The scientist insisted on the speed of computation being increased.

6) We didn't know of their having worked in the field of computing.

7) There is a probability of our being sent to the conference.

8) There is a probability of his being appointed chief engineer at our plant.

9) Our going there now won't help much.

10) The semiconductor diode being very important device of modem science and industry is common knowledge.

11) The semiconductor diodes having many important characteristics resulted in their being used in different branches of industry.

12) We know of copper, silver, aluminium and many other metals being good conductors of electricity.

13) The reliable functioning of television depends on the television set being equipped with semiconductors.

14) Benjamin Franklin's having invented the first lightning conductor is a well established fact.

15) We were told about their having studied a number of problems connected with the development of computing machinery.

16) Kurchatov's having devoted all his life to nuclear physics is known to everybody.

17) I know of their being shown the new device.

18) We know of the Curies' having discovered some new radioactive elements.

19) I have heard of their experiment being successfully completed in the nearest future.

20) We know of Rutherford's having investigated the nature of alpha-particles.