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Vocabulary

  1. emit (v) испускать, излучать (свет)

  2. emission (n) испускание (света), эмиссия

  3. emitted (adj) излученный

  4. release (v) испускать, выбрасывать

  5. amplify(v) усиливать

  6. amplification (n) усиление

  7. stimulate (v) возбуждать, индуцировать

  8. wavelength (n) длина волны

  9. flashlight (n) мигающий свет, электрический фонарик

  10. output (n) мощность

  11. lasing medium среда, генерирующая в оптическом диапазоне

  12. lasing material вещество, излучающее в оптическом диапазоне

4.4 Match the fields of laser applications with their definitions.

1. dental drills

2. tattoo removal

3. high-speed metal cutting

4. hair replacement

5. eye surgery

  1. To put hair back to its proper place

  2. Medical operation on people’ s eyes

  3. A small, high-speed tool used in dentistry to remove decayed tooth material prior to the insertion of a dental filling

  4. The process of taking away a permanent picture drawn on a part of your body by putting ink into your skin with a needle.

  5. Very quick operations aimed at dividing metal material into pieces

4.5 Match the words similar in the meaning.

  1. extremely

  2. efficient

  3. extraordinary

  4. move in step

  5. tight

  6. diffuse

  7. randomly

  1. straight

  2. dispersed

  3. unplanned

  4. pivotal

  5. amazing

  6. operate in conformity

  7. effective

4.6 Read the text 4.3 again and answer the following questions.

  1. What is a laser?

  2. What fields of human activity are the lasers used in?

  3. What is the difference between regular and laser light ?

  4. What types of lasers have you learned about from the text?

  5. What do you think about the prospects of laser applications?

Unit 5

Before you read

5.1 Read and memorize the following terms.

1. fiber/fibre (n)

2. fiber optics

3. loss (n)

4. immune (adj)

5. interference (n)

6. bandwidth (n)

7. sensor (n)

8. remote sensing

9. bundle (n)

10. network k(n, v)

11. propagate (v)

12. attenuation (n)

13. repeater (n)

14. duct (n)

15. cross-talk (n)

16. pick up of smth

17. ignition (n)

18. modulate (v)

19. light guide (n)

20. imaging device

21. gain medium

22. route (v)

волокно

оптоволоконная техника

потери

устойчивый

помехи, интерференция

ширина полосы пропускания

датчик

дистанционное считывание

пучок, группа

сеть; создавать/подключаться к сети

распространять(ся)

затухание

ретранслятор

канал

помехи, перекрестные искажения

улавливание (зд .шума)

воспламенение, возгорание

модулировать, понижать частоту

световод

устройство изображения

рабочая среда лазера

направлять

5.2 Match the words with their definitions.

1.fibre a. to change something, especially in order to achieve some effect

2.fibre optics b. a very thin piece of natural or artificial substance

3 sensor c. the reduction of strength, amount or size of something

4 bundle d. the use of long fibres of glass or plastic to carry

information as light signals

5 immune e. a piece of equipment that reacts to physical changes

such as amount of heat, light, etc.

6 loss f. a group of things that have been tied or connected together

7 network g. not influenced or affected by something

8 attenuation h. to connect computers together so that each computer can

send and receive information

9 modulate i. the state of having less of something than before.

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