Check your understanding

Exercise 1. Read the text and answer the questions.

1. Why are lasers ideal for space communication?

2. What is the use of lasers restricted by?

3. Why are lasers used in so many fields of our life?

4. Why should lasers be used only by trained personnel wearing protective goggles?

5. In what sphere to your mind have lasers found the widest application and why?

Exercise 2. Find the suitable endings of the following sentences.

1. Lasers have become valuable tools in…

2. Powerful laser beam can be focused on…

3. Lasers are also the most effective detectors of…

4. Laser techniques have also been used for…

5. Lasers have been used to…

6. Laser techniques have also been developed for…

1. industry, scientific research, communication, medicine, military technologies and arts.

2. a small spot with enormous power density.

3. certain types of air pollution.

4. high-density information recording.

5. “weld” the retina, bore holes in the skull, vaporize lesions and cauterize blood vessels.

6. lab tests of small biological samples.

Exercise 3. Translate the passage “Military Technology” and discuss the topic

“What do you think about missile defense systems situation in Russia and the USA?”