2. Invention of Radio
The Radio
?
The history and origin of radio is as interesting as the
medium itself. The journey of the invention of radio
started with the discovery of radio waves or the
electromagnetic waves, which transmit
music, pictures, speech and other data, via the medium
of air. However, radio is also closely related with other
technologies, like telegraphy and telephone, as the initial
radio operated on the principle of ‘wireless telegraphy’.
5. Guglielmo Marconi
<Titanic events have demonstrated the power of wireless telegraphy>
1912.Was a huge accident occurs. Luxury cruise ship Titanic hit an iceberg and
sank.Due to accidents, 1,526 of the 2,239 people aboard who lost their lives at sea in
the Arctic.The reason the rest of this structure was that Marconi invented wireless
telegraphy. Titanic architect shortly before the ship sank through the wireless
telegraphy was near the ship bumped SOS quickly on the scene to hear the signal
arrived. At the time, the media said.
"Marconi's knowledge as a scientist and inventor as genius has saved lives of the
survivors of the Titanic should be remembered."
6. Development of Radio
During the 1890s,
In addition to Marconi, Nikola Tesla
and several others developed radio-
conductors, transmitters, and receivers,
making it possible to send Morse code
messages across long distances without
the physical limitations of wires, cables, or
poles. This led to the terms wireless or
radio-telegraphy. Telegrams sent across
the wireless were radio-grams, or "radios"
for short.
7. Development of Radio
“ Radio can refer to either the electronic appliance that
we listen with or the content listened to. However, it
all started with the discovery of "radio waves" -
electromagnetic waves that have the capacity to
transmit music, speech, pictures and other data
invisibly through the air. Many devices work by using
electromagnetic waves including:
”
radio, microwaves, cordless phones, remote
controlled toys, television broadcasts, and more.
8. The FM Radio
Following this, the most popular radio technology
was discovered, the FM radio. The credit for inventing
the frequency modulated radio goes to Edwin Howard
Armstrong in 1933. The specialty of FM was that it
improved the quality of audio signals drastically. The
noise caused by electrical equipment and the earth's
atmosphere could now be easily controlled and
reduced. In 1947, Bell Labs invented the transistor,
while Sony, a Japanese company, introduced the
transistor radio in 1954.
9. Various Radio
<Korea’s First ‘FM Radio’> <GUM-SUNG Radio ‘RM-715’>
10. Current Radio Status
NOW
Since then, radio has not looked back and has
become one of the popular mediums of portable
?
entertainment. In the 21st century, technological
developments have introduced concepts like
internet radio, thereby broadening the horizon.
Satellite radio is yet another latest development in
the field, via which you can listen to numerous
international radio channels anywhere.
11. Reference Site
http://en.wikipedia.org/wiki/Guglielmo_
Marconi
http://inventors.about.com/od/rstartinventions/a/r
adio.htm
http://blog.naver.com/ghcl2233
