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Heinrich Hertz proved you could transmit and receive electric waves wirelessly.
Pic from britanica -
Guglielmo Marconi is considered the father of radio because he discovered he could send signals at a greater range.
Pic from history.com -
Nikola Tesla developed the tesla coil it is an induction coil widely used in radio.
Pic from biography.com -
The first amplifier that helped push waves further and further created by reginald fessenden.
Pic from 120 years of electronic music -
First radio station in the US. Created by Frank Concord. Pic from audacy.com -
The Federal radio commission was created to help clean up radio station broadcast chaos.
pic from wikipedia -
WEAF aired a broadcast for an apartment complex charging $50. Pic from the radio historian.