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ELECTRIC TELEGRAPH
By Samuel Morse.
You could emit and recieve messages.
It used the Morse code. -
Multiplexing
It allowed to send several messages at the same time with the use of a single cable -
FIXED TELEPHONE
1860: Antonio Meucci. 1876: Alexander Graham Bell -
Submarine cable
It made possible to connect two continents, America and Europe. -
Magnetic Waves
J.C Maxwell proposes the theoretical existence of electromagnetic waves. -
Magnetic Waves
H.R Hertz manages to generate electromagnetic waves and detect them in a device located 30 cm from the emitter. -
Wireless telegraphy
By Marconi -
Period: to
Television tecnology
By John L. Braid, Charles F. Jenkins i Vadímir Zworykin -
RADIO
By Fesender -
Radio marketing
Commercial broadcasting of radio in the United States and Europe. -
TELEVISION
First emissions. -
Television
Olimpic Games retransmition. -
Radio
The use of the transistor made it possible to reduce the size and cost of radio receivers. -
Television
600 million people watched the man’s arrival to the moon on television. -
MOBILE PHONE
By Martin Cooper. First call by a mobile phone -
Mobile phones marketing
Mobile phones arrive to Japan and USA -
Mobile Phones
More than four billion mobile phones.
