FREE ESSAY ON TELEVISION

TELEVISION

TELEVISION
We have at least a television in our home. television allows us to hear and see events as
soon as they happen. If our grandma's mother or father see TV, they'll suprised and say
'This is diablo's machine!'. We watch TV at least two hour in a day. 
HOW WORKS TV?
When a TV program is broadcast the sound and picture are sent out simultaneously by two
different radio systems.
The TV camera takes the picture. Camera is the most important part of the camera. 
The light from the object is allowed to fall on a light sensivite plate located inside
the camera tube by the lens. This plate consists of thousands of light sensivite
particles which act as photoelectric cells. Each photoelectric cell gives off electrons
in the same proportion as the light falling on it. This forms an image on the plate.
The bright and dark spots form an electric current which leaves the transmitter as
carrier waves. These waves are picked up by the receiver. The TV receiver picks up both
the sound and the picture. The antenna of the TV set picks up the weak current and passes
it to a cathode ray tube which is called the picture tube. 
The electron beam scans the screen of the picture tube in exactly the same way that it
scanned the target of the camera tube and a picture is formed on TV screen. The image on
the screen changes 25 times a second and, since we can't detect individual pictures
moving at this speed, we see a continuously moving image. 
WHO INVENTED THE TV?
Television wasn't invented by a man. Many people helped for inventing TV. (For example
German Nipkow (1884) , Russian Rosing (1911) , American Zworikin...)
DEVELOPERS
1884aNipkow**German**
1911aRosing**Russian**-Zworikin**American**
1923-1928aBaird**English**
1923-1928aBarthelemy-Halweck**French**
TV's STEPS in WORLD
a N?PKOW
He made a TV and he invented scanning disk with holes. 
a ROS?NG & ZWORYK?N
They invented first vision on screen. 
a BAIRD & HALWECK-BARTHELEMY
Baird in England , Halweck and Barthelemy in France transmit blur visions with
radioelectiric waves.
a 1947
The visions became clear visions
a 1951
Colored TV was invented.
a 1953 & 1962
Eurovision in 1953 , Mondovision in 1962 were broadcasted and TV became a important thing
in world. 
TV's STEPS in TURKEY
a 1963
A education center for TV was builded.
a 1966
A small broadcaster was bought for Ankara and started closed broadcasting.
a 1984
We started colored broadcasting.