Добавил:
Upload Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз: Предмет: Файл:
Учебник по английскому.docx
Скачиваний:
24
Добавлен:
16.11.2018
Размер:
1.21 Mб
Скачать
  1. Text 10a

  2. Прочитайте текст и найдите абзацы, где говорится о применении лазеров. Переведите.

  3. Laser

  4. In the «War of Worlds» written before the turn of the last cen­tury H. Wells told a fantastic story of how Martians almost invaded our Earth. Their weapon was a mysterious «sword of heat». Today Wells' sword of heat has come to reality in the laser. The name stands for light amplification by stimulated emission of radiation.

  5. Laser, one of the most sophisticated inventions of man, pro­duces an intensive beam of light of a very pure single colour. It rep­resents the fulfilment of one of the mankind's oldest dreams of technology to provide1 a light beam intensive enough to vaporize the hardest and most heat-resistant materials. It can indeed make lead run like water, or, when focused, it can vaporize any substance on the earth. There is no material unamenable2 to laser treatment and laser will become one of the main technological tools quite soon.

  6. The applications of laser in industry and science are so many and so varied as to suggest magic3. Scientists in many countries are working at a very interesting problem: combining the two big tech­nological discoveries of the second half of the 20th century — laser and thermonuclear reaction — to produce a practically limitless source of energy. Physicists of this country have developed large la­ser installations to conduct physical experiments in heating ther­monuclear fuel with laser beams. There also exists an idea to use laser for solving the problem of controlled thermonuclear reaction. The laser beam must heat the fuel to the required temperature so quickly that the plasma does not have time to disintegrate. Accord­ing to current estimates, the duration of the pulse has to be approx­imately a billionth of a second. The light capacity of this pulse would be dozens of times greater than the capacity of all the world's power plants. To meet such demands in practice, scientists and engineers must work hard as it is clear that a lot of difficulties are to be encountered on route4.

  7. The laser's most important potential may be its use in commu­nications. The intensity of a laser can be rapidly changed to encode very complex signals. In principle, one laser beam, vibrating a bil­lion times faster than ordinary radio waves, could carry the radio, TV and telephone messages of the world simultaneously. In just a

  8. 198

  9. fraction of a second, for example, one laser beam could transmit the entire text of the Encyclopaedia Britannica.

  10. Besides, there are projects to use lasers for long distance com­munication and for transmission of energy to space stations, to the surface of the Moon or to planets in the Solar system. Projects have also been suggested to place lasers aboard Earth satellites nearer to the Sun in order to transform the solar radiation into laser beams, with this transformed energy subsequently transmitted to the Earth or to other space bodies. These projects have not yet been put into effect5, because of the great technological difficulties to be over­come and, therefore, the great cost involved. But there is no doubt that in time6 these projects will be realized and the laser beam will begin operating in outer space as well.

  11. Notes to the Text

  1. to provide — получать

  2. unamenable — неподдающийся

  3. as to suggest magic — можно принять за чудо

  4. on route — на пути

  5. put into effect — осуществлять

  6. in time — со временем

  1. УПРАЖНЕНИЯ Упражнение 8. Просмотрите текст 10А и ответьте на вопросы.

  2. What is this text about? 2. What does the word «laser» mean? 3. What is the laser, is it a device or some phenomenon? 4. Who was the first to write about lasers? 5. What writer from this country wrote a book about a laser? 6. What can a laser do? 7. Where can it be used? 8. What other uses do you know?

  3. Упражнение 9. Укажите, какие утверждения соответствуют содержанию текста 10А. Исправьте неправильные утверждения.

  4. 1. Laser means «light amplification by stimulated emission of radiation». 2. Laser produces an intensive beam of light. 3. In the next few years laser will become one of the main technological tools. 4. Martians almost invaded the Earth before the turn of the last century. 5. Laser and thermonuclear reaction can produce a limited source of energy. 6. The laser beam heats the fuel so quickly that the plasma disintegrates. 7. There are projects to transform lu-

  5. 199

  6. nar radiation into beams. 8. The laser beam will begin operating in outer space.

  7. Упражнение 10. Найдите в тексте 10А инфинитивы в функции части ска­зуемого и обстоятельства цели (см. 3-й и 5-й абзацы).

  8. Упражнение 11. Найдите предложения с инфинитивом в функции опре­деления и дополнения, переведите.

  9. 1. То design, construct and operate a laser system is a great technological achievement. 2. To protect the water resources, forests and atmosphere, several laws were passed in Russia in the 1970s. 3. A very interesting problem is to produce a practically limitless source of energy. 4. There are projects to use lasers for long dis­tance communication. 5. Automation makes it possible to obtain and develop new sources of energy. 6. To combine laser and ther­monuclear reaction is a very interesting problem for the scientists in many countries. 7. To conduct physical experiments with laser beams, Russian physicists have developed large laser installations. 8. Some Western experts consider that it is practically impossible to protect big cities from pollution. 9. Lasers to be placed on Earth satellites will transform solar radiation into laser beams. 10. A spe­cial design bureau in St. Petersburg was the first in the world to de­velop production of superlong escalators. 11. To put some projects with lasers in operation, great technological difficulties must be overcome. 12. One of the ways to make planes as economical as possible is to lighten the aircraft by using new composite materials. 13. Signals to be measured must be strong enough.

  10. Упражнение 12. Определите, чем выражено определение, переведите.

  11. 1. The new system developed increased the safety and effi­ciency of a car. 2. The laser's most important potential use may be its long distance communication applications. 3. Provided the problems of using laser for controlled thermonuclear reaction were solved, the capacity of the pulse received would be much greater than that of all the world's power plants. 4. All a pilot needs to do is to tune to radio transmitters and he will get direction signals he needs. 5. One of the problems scientists are working at is to trans­mit energy to space stations by using lasers. 6. Laser provides a light beam intensive enough to vaporize the hardest and most heat-resis­tant materials. 7. A hypersonic aircraft will require complicated cooling measures because of the extreme temperatures involved. 8. A new electronic device to be installed in the car's panel will cal-

  12. 200

  13. culate how far one can drive on the fuel left. 9. The hardest materi­als a laser beam is aimed at vaporize within a fraction of a second.

  1. Aircraft designers are interested in all kinds of new materials that are strong enough to be used for high-speed airliners.

  2. Noise and vibration are also the problems to be faced by design­ers of hypersonic crafts. 12. Besides, there is one more problem to be studied — that of surface cooling. 13. The ordinary aircraft win­dows would make the future superliner structure too weak to with­stand great stresses developed. 14. Every student of Cambridge is to go to his tutor once a week to discuss with him the work done.

  1. УПРАЖНЕНИЯ ДЛЯ САМОСТОЯТЕЛЬНОЙ РАБОТЫ Упражнение 13. Определите части речи по суффиксам и префиксам.

  2. encode, capacity, disintegrate, emission, widen, intensive, in­credible, defence, stranger, reality, strengthen, fulfilment, inde­structible, amplification, substance, entirely, vaporize.

  3. Упражнение 14. Назовите производные от следующих слов, переведите.

  4. limit, transmit, approximate, success, science, relate.

  5. Упражнение 15. Найдите русскому слову соответствующее английское.

  6. устанавливать — installment, installation, install; различие, разница — differ, difference, different; распадаться — disintegrator, disintegration, disintegrate; применимый — application, applicable, apply; укреплять — strong, strength, strengthen; эффективно — efficient, efficiency, efficiently; усилитель — amplification, amplifier, amplify.

  7. Упражнение 16. Найдите:

  8. а) синонимы

  9. rapidly, sophisticated, to conduct, demand, almost, quickly, to carry out, approximately, opportunity, requirement, also, use, to fulfill, complex, as well, to realize, application, possibility;

  10. б) антонимы

  11. further, integrate, cooling, outside, powerless, uncontrolled, limited, disintegrate, nearer, capable, limitless, controlled, inca­pable, powerful, heating, inside.

  12. 201

  13. Упражнение 17. Переведите предложения, обращая внимание на много­значность слов make и light.

  14. What makes a soap bubble (мыльный пузырь) rise and fall. If a soap bubble does not break at once, it will begin to fall. Why? To explain this, we must remember a balloon which is filled with hot air. It rises for some time and then it falls again. A balloon rises be­cause the hot air inside it is lighter than the air round it, and as it is lighter, it must rise. When the air inside a balloon cools, the weight of the balloon itself makes it fall. A soap bubble is really a little bal­loon filled with hot air. This air is much lighter than the air outside. It can carry the weight of the water which makes the skin of the soap bubble. But this cannot last for a long time, because the skin of the soap bubble is very thin. The bubble becomes as cool as the air around it and it begins to fall. It is interesting to know that the early experiments with balloons were based on soap bubbles.

  15. Упражнение 18. Переведите.

  16. There is a large garage on Seventh Street that provides work for eleven men. There is one man who meets the customers. There are two other men who take care of batteries. There is another man who washes cars. There are three other men who sell gas and oil. There is another man who repairs timers. There are two men who work with engines and there is one man who sells tires. There is no better place for automobile service.

  17. Упражнение 19. Заполните пропуски соответствующей формой глагола to be.

  18. I ... now in the garage on Seventh Street. There ... three cars here. One ... a Ford. There ... a man in it. He ... buying a tire. One car ... a Buick. There ... five people in it. There ... a third саг. A man and his wife ... in it. Their battery ... dead. The two battery men ... looking at it. «I... sure you will have to rent a battery», one man says. «We ... a long way from home», the man in the car an­swers. «We .... not here often. We must buy a battery. There ... nothing else to do».

  19. Упражнение 20. Дайте недостающие формы глаголов, запомните их.

  20. chosen, fed, costing, put, overcome, coming, made.

  21. 202

  22. Упражнение 21. Прочитайте и переведите без словаря.

  23. То understand why light from the laser is so concentrated, you must know that light travels in waves. Ordinary white light is made up of many wavelengths travelling in every direction. Laser light is essentially of one wavelength, with all the waves moving in one di­rection. Because the laser wavelengths intensify each other, they can remain in an unbelievably straight beam for a long distance. Al­most any substance can be forced to «lase» if you work hard enough with it. Gas lasers give off continuous beams of light. Tiny semi­conductor lasers may be especially useful in computers for trans­mitting signals to replace the use of cables. Many lasers can give off invisible radiation, either infrared or ultraviolet.

  24. CONVERSATION Exercise 1. Answer the questions.

  25. 1. What is a laser? (a device producing an intensive beam of light) 2. What is its principle of operation? (light amplification by stimulated emission of radiation) 3. What light is produced by a la­ser? (light of pure single colour) 4. What can be done by means of a laser? (vaporizing the hardest materials) 5. What materials can be treated with a laser? (practically any material and any substance) 6. What is the most promising use of lasers? (the use in all kinds of communication) 7. What prevents putting into effect the projects to use lasers more widely in space? (great technological difficulties and great cost involved)

  26. Exercise 2. Make a sentence out of the two parts.

  1. A laser can find

  2. It is very interesting to com­bine

  3. There is an idea

  4. In this case a laser beam

  5. The light capacity in a laser in­stallation should be dozens of times greater

  6. To develop such a laser system in practice

  7. Scientists and engineers must work

  1. must heat the fuel to the re­quired temperature very quickly.

  2. very wide application.

  3. hard to overcome numerous technological difficulties.

  4. is not an easy task.

  5. to use a laser for solving the problem of controlled thermonu­clear reaction.

  6. laser and thermonuclear reac­tion to produce a limitless source of energy.

  1. 7. than the capacity of all the world's power plants.

  1. 203

Тут вы можете оставить комментарий к выбранному абзацу или сообщить об ошибке.

Оставленные комментарии видны всем.