Power Engineering. Соколова Е.В. - 25 стр.

      8.6 Переведите словосочетания

       microwave amplification, maser amplifiers, quantum electric device, energy
level, excessive energy, high energy atoms, emissive condition, three-level maser,
low-noise devices, flicker noise, shot noise, partition noise, high quality, space com-
munication, weak light waves, weak radio waves, two energy levels, the optical fre-
quency region, because of their sensitivity, as sharp as, not so sharp as.

      8.7 Ответьте на вопросы

       1. What is a maser? 2. How do masers operate? 3. What is maser based on? 4.
In what way do the electrons move? 5. What happens to the atom under proper condi-
tions? 6. How is the released energy radiated? 7. What have the scientists found? 8.
Which microwave devices do you know? 9. What molecules in various energy states
can interact with? 10. What are the remarkable properties of the maser to offer? 11.
How is amplification obtained at a lower frequency? 12. Do energy waves emitted by
masers move faster than other signals? 13. By what basic features are masers charac-
terized? 14. Why can maser amplifiers penetrate deep into the universe? 15. What can
scientists measure with the help of masers? 16. Who has made great contribution to
the maser development?

      8.8 Переведите предложения

       1 We know vacuum tubes to be made in all sizes. 2. Vacuum tubes are known
to be made in all sizes. З.То accelerate economic progress one must introduce auto-
mation into production processes. 4. In this case the signals to be transmitted are very
weak. 5. Our plant is said to have obtained new electronic devices. 6. It is necessary
for these computers to be repaired very soon. 7. To master the fundamentals of radio
engineering is extremely essential for every radio engineer. 8. We consider the
knowledge of foreign language to be of great significance for every engineer. 9. The
knowledge of foreign language is known to be of great significance for every engi-
neer. 10. As amplifier of radio waves masers proved to be one hundred to one thou-
sand times more sensitive than those which were previously available. 11. Masers are
certain to be employed in all branches of science and technology. 12. This sophisti-
cate method is unlikely to be used in this case.

      8.9 Определите, какой частью речи являются слова

       absorption, quantize, molecular, electromagnetic, sensitive, interference, avail-
able, previously, undisturbed, scientist, greatly

      8.10 Расскажите по-английски о характерных особенностях мазера




                                                                                      27