Английский язык. Громовая И.И - 85 стр.

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83
Radar set includes a transmitter and a receiver. If a transmitter sends out a
beam of waves, an adjacent receiver operating like a television receiver translates
the echoed radio waves into a kind of picture. These radio waves can penetrate
clouds and sea depths. They continue to move out in a straight line from a
transmitter until they strike something solid. Then they are reflected back.
The reflected waves moving back to the radar set are received and translated
into a tiny spot on the cathode-ray-tube screen or display. The display may
resemble a map of the surroundings and the objects are as bright spots on a
dark background.
The most important uses of radar are known to be in ship and air navigation.
Radar set on board a ship can provide the captain with complete information
about the objects around the ship. It will show the distances and positions of
other ships, islands or land so that a safe course can be steered.
There are many types of radar intended for use on ships and planes. The
electrical features of radar for use in airplanes are similar to those used on
ships. Special types of radar provide air-traffic control, “blond landing” and
ground-controlled approach.
1
Radar provides information for meteorology and
astronomy, such as detecting meteors and studying cosmic environments.
(1634 t. un.)
NOTES:
1
ground-controlled approach – наземное управление при заходе на по-
садку
ТЕКСТЫ ДЛЯ САМОСТОЯТЕЛЬНОЙ РАБОТЫ
СТУДЕНТОВ II КУРСА
From the history of computers
The introduction of agriculture revolutionized ancient man’s social, economic,
and cultural potential. This was the first great step in the evolution of civilization.
The more recent Industrial Revolution, vastly increasing man’s productive
capabilities, was the next great step and brought forth our present highly mechanized
economic and interdependent social civilization.
Nowadays we have another new kind of revolution, based on machines that
greatly increase man’s thinking capabilities of planning, analyzing, computing, and
controlling. Hundreds of millions of computers are already in daily use penetrating
almost all spheres of our modern society, from nuclear energy production and
missile design to the processing of bank checks and medical diagnoses.

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