Упр.10 Unit 1 Рабочая тетрадь ГДЗ English Михеева 9 класс
10. Read the text and complete it with the phrases (a—g) below. a) This scans the screen. b) Live television programmes show you what is happening as it happens.
Приведем выдержку из задания из учебника Михеева, Афанасьева 9 класс, Дрофа:
10. Read the text and complete it with the phrases (a—g) below.
a) This scans the screen.
b) Live television programmes show you what is happening as it happens.
c) Baird showed his set in 1926.
d) These pass into the TV set.
e) Scientists have been interested in the idea of television since the 1880s.
f) Now nearly every home has one.
g) These tiny flashes of colour build up the picture on your screen.
Television
Television is a way of sending sound and pictures through
the air. (1) e) Scientists have been interested in the idea of television since the 1880s. Although John Logie Baird was the first to show how television worked, his success was based on work by many other scientists from all over the
world. (2) c) Baird showed his set in 1926. The first television service opened in 1936 in Britain. Colour television began in the United States in 1956.
At first, all television was black and white. Few people owned television sets because they were very expensive. (3) f) Now nearly every home has one.
Television works by changing light waves into electric signals. This happens inside the TV camera. A picture of what is happening in front of the camera forms on a special screen behind the lens. Behind the screen is an electron gun.
(4) a) This scans the screen. It moves from left to right to cover each part of the picture. Each part is turned into an electric signal which is made stronger, then sent to the transmitter as radio waves. They are picked up by home TV antennas and changed back into electric signals. (5) d) These pass into the TV set.
The TV screen is covered with tiny chemical dots. In a colour set, these are arranged in groups of three: one red, one blue, one green. At the back there are other electron guns. These fire a beam of electrons to scan the screen just as the camera gun does. As each electron hits the screen, it lights up a dot.
(6) g) These tiny flashes of colour build up the picture on your screen. You do not see lines of coloured flashing lights, because the electron gun moves too fast for the eye to follow. What you see is a picture of what is happening in the television studio.
(7) b) Live television programmes show you what is happening as it happens. Most programmes are recorded on film or videotape and sent out later.