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#1
"James Clerk Maxwell showed in theoretical and mathematical form... that electromagnetic waves could propagate through free space." -
#2
"...the Italian inventor Gugliemo Marconi built the first complete, commercially successful wireless telegraphy system based on airborne Hertzian waves (radio transmission)." -
#3
"...Brazilian priest Roberto Landell de Moura transmitted the human voice wirelessly for a distance of approximately a half mile." -
#4
"On Christmas Eve..., Reginald Fessenden used an Alaxanderson alternator and a rotary spark-gap transmitter to make the first radio audio broadcast, from Brant Rock, Massachusetts. Ships at sea heard a broadcast that included Fessenden playing 'O Holy Night' on the violin and reading a passage from the Bible. -
#5
"The first radio news program was broadcast...by station 8MK in Detroit, Michigan, which survives today as all-new format station WWJ under ownership of the CBS network." -
#6
"In the 1930s, regular analog television broadcasting began in some parts of Europe and North America. By the end of the decade there were roughly 25,000 all-electronic receivers in existence worldwide, the majority of them in the UK." -
#7
"In the early 1930s, single sideband and frequency modulation were invented by amateur radio operators. By the end of the decade, they were established commercial modes." -
#8
"...the newly formed Sony company introduced its first transistorized radio. It was small enough to fit in a vest pocket, powered by a small battery." -
#9
"...color television was being broadcast commercially (though not all broadcasts or programs were in color), and the first (radio) communication satellite, Telstar, was launched." -
#10
"The Advanced Mobile Phone System analog moblie cell phone system, developed by Bell Labs, was introduced in the Americas in 1978, gave much more capacity."
