4. True or false. If the statement is false correct it.

1. Radio waves are the only carriers of information in space.

2. Radio is considered to help man in outer space exploring.

3. Electronics is not playing a vital role in air traveling and space location.

4. With proper refinements, radio communication is to be set up over small distances.

5. An application of quantum electronics will be of great importance for a mankind.

5. Match the words with their definitions:

Converter, ultraviolet rays, intensity, hydrogen, radar, electronics

1. is the lightest gas and the simplest chemical element in nature;

2. is the way of discovering the position or speed of things that cannot be seen by using radio signals;

3. an apparatus that changes the form or direction of something;

4. something that is great in strength or degree;

5. the end of the spectrum that make up light that can be seen by humans;

6. the technology of using transistors, silicon chips, valves to manufacture devices

6. Make up sentences using the words and phrases below. Translate them into Ukrainian:

A powerful means, radiotelescope, achievement, transmission, space location, communication, quantum electronics.

7. Answer the questions to the text:

1. Why is electronics a powerful and promising science for modern people?

2. What are other carriers of information in space?

3. What role does radio play in space investigation?

4. Is electronics important for communication and data transmission?

TEXT B

1. Read and translate the text in a written form: Evolution of Microelectronics

 The earliest electronic circuits were fairly simple. They were composed of a few tubes, transformers, resistors, capacitors, and wiring. As more was learned by designers, they began to increase both the size and complexity of circuits. Component limitations were soon identified as this technology developed.

VACUUM-TUBE EQUIPMENT

Vacuum tubes were found to have several built-in problems. Although the tubes were lightweight, associated components and chassis were quite heavy. It was not uncommon for such chassis to weigh 40 to 50 pounds. In addition, the tubes generated a lot of heat, required a warm-up time from 1 to 2 minutes, and required hefty power supply voltages of 300 volts dc and more.

No two tubes of the same type were exactly alike in output characteristics. Therefore, designers were required to produce circuits that could work with any tube of a particular type. This meant that additional components were often required to tune the circuit to the output characteristics required for the tube used.

The actual size of the transformer is approximately 4 X 4 X 3 inches. Capacitors are approximately 1 X 3 inches. The components are very large when compared to modern microelectronics.

A circuit could be designed either as a complete system or as a functional part of a larger system. In complex systems, such as radar, many separate circuits were needed to accomplish the desired tasks. Multiple-function tubes, such as dual diodes, dual triodes, tetrodes, and others helped considerably to reduce the size of circuits. However, weight, heat, and power consumption continued to be problems that plagued designers.

2. Make up a plan of the text in the form of questions.

TEXT C

1. Mind the following words:

1. an alternative current – перемінний струм

2. wireless broadcasting – безпровідна трансляція

3. frequency – частота

4. carrier – носій

5. to permit – дозволяти

6. dimension – розмір, межа

2. Listen to the text and try to understand it.

3. Answer the following questions:

1. When is radio frequency generated?

2. When can RF be used?

3. What is the function of an antenna?

4. What is the range of frequency for satellite communication?

5. What permits the use of antenna for commercial use?