Page 253 - DK Children's Encyclopedia

Television SEE ALSO

▸ ▸ Communication
p.69

Television lets people watch the news, ▸ ▸ Factories p.97
documentaries, films, cartoons, and game shows ▸ ▸ Hearing p.127
without leaving the house. It is one of the world’s ▸ ▸ Radio p.203

most popular forms of entertainment. ▸ ▸ Satellites p.215
▸ ▸ Sight p.226

Sounds and 2. Television satellite
pictures are The recorded program is
recorded, using sent as signals to machines
a video camera. in space, called satellites.
The signals are then sent back
to many places on Earth.

3. Broadcast tower
These towers pick up satellite
signals and send them out
to areas nearby. This can
be done using special cables
or small satellite dishes.

1. Filming
Television programs are
recorded using video Televisions pick up
cameras. When a program the signals from
is ready, the production their nearest tower.
company sends, or
transmits, it. Satellite dishes
send signals to
and from Earth.

4. Television
Sending signals John Logie Baird The signals are turned
The pictures and sounds of a invented the first back into pictures and
sounds using electricity.
television program are sent, or television in 1926, We can then watch the
transmitted, around the world as using cookie tins, television program.
signals. Televisions pick up the hat boxes, bicycle
signals and change them back lights, and
into moving images. needles.

Early television
The first television sets
were big boxes with small
screens. They showed
programs in black and
white. By the 1950s, color The picture on the
televisions became more screen is made up of
common in homes. thousands of tiny
colored squares,
called pixels.
Televisor (1930)

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