Exercise 13. Do the following puzzle. Use the information from the text

Exercise 11. Give synonyms from the text for the following words and word combinations.

Exercise 10. Give the English equivalents for the following words and word combinations.

Наземні електричні системи; електрична побутова компанія; середовище із здатністю передавати; приймач; світлодіод; інжекційний лазерний діод; кут падіння; критичне значення; серцевина оптичного волокна; оптичне покриття; буферний матеріал; покриття із високим відбиттям; зовнішнє покриття.

On a large scale; a set of equipment used to generate electromagnetic waves carrying messages or signals; to pass data from one place to another; to force a passage through something; to return after meeting an obstacle; joining different parts or qualities; a certain area that has a property to reflect radiation, light etc.; to protect from danger, risk; not useful admixtures; contribution of information.

Exercise 12. Decide if the following statements are true, false or not stated. Prove you point of view.

1. Fiber optic systems are more effectively used in terrestrial systems than in any other medium.

2. Fiber systems are composed of two components – transmitter and receiver.

3. Copper wire systems use electronic impulses to transmit information.

4. Transmitter is always the beginning of any data-passing system.

5. A light emitting diode tunnels light pulses into the fiber optic medium.

6. Total internal reflection does not allow transmitting any information.

7. Germanium is more expensive than silica in producing optic cladding.

8. Optic core and optic cladding are made of completely different materials which makes data-passing easier.

9. Buffering material defends the internal part of fiber-optic cable from danger.

10. The coded information is translated in a reverse order which hinders its understanding.

^1

^2

^3

^4

^5

^6

^7

^8

^9

^10

^11

^12

^13

^14

^15

16

^17

^18

^19

^20

^21

^22

^23

^24

Across:

2. Thick strong metal rope; a set of wires.

5. Injection-laser diode.

6. The act or process of sending out an electronic signal or message.

10. A material such as a rope that is made from a mass of natural or artificial threads.

11. Light-emitting diode.

12. A factory or place where power is produced.

17. A covering of a hard material, used as protection.

18. Article.

19. To last all through a period of time or to cover the whole of it.

21. The act of putting information.

23. The way in which light meets surface.

24. A system of talking to somebody else over long distance.

Down:

1. A series of connected things.

3. A structure such as a house.

4. Element.

5. Data.

7. A substance, especially a liquid, that can dissolve another substance.

8. An object or a piece of equipment that has been designed to do a particular job.

9. University area.

13. Television.

14. Condition of something or somebody.

15. Metal in the form of thin thread.

16. To dig through.

20. A long thin mark on the surface.

22. To move something on a particular place.

Дата добавления: 2015-01-03