Radio
Here are a few facts about radio:
| 1887: |
Radio waves discovered.
| 1900: |
| De Forest patents device to improve weak signals. |
| 1895: |
Guglielmo Marconi performs simple experiments which convince him it is possible to send signals through the air using electromagnetic waves.
| 1901: |
| Marconi transmits the telegraphic signal of the letter "S" a distance across the Atlantic Ocean. |
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| 1920: |
| KDKA in Pittsburgh transmits the first commercial radio broadcast. |
| 1926: |
NBC begins first network news on radio.
| 1950: |
| 90 million radio sets, 10 million TV sets in use in U.S. homes. |
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