Common Ground: Community Radio as a Tool for Climate Change Education

Several organizations have been engaged in using community radio as a tool for raising awareness and encouraging participation. Introduction Community radio is radio run by and for communities in local languages, often with programming focused on issues at the heart of local development, such as climate change and environmental degradation. Stories about climate and environmental[…]

Breaker, Breaker: The Science and Use of Radio Waves

Radio waves were first predicted by mathematical work done in 1867 by Scottish mathematical physicist James Clerk Maxwell. Curated/Reviewed by Matthew A. McIntoshPublic HistorianBrewminate Introduction Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies as high as 300 gigahertz (GHz) to as low as 30 hertz (Hz).[1] At 300 GHz, the corresponding wavelength is 1 mm (shorter than a grain[…]

Communication Revolution: A History of Radio

Radio development began as “wireless telegraphy”. Later radio history increasingly involves matters of broadcasting. Curated/Reviewed by Matthew A. McIntoshPublic HistorianBrewminate Invention and Early Growth The idea of wireless communication predates the discovery of “radio” with experiments in “wireless telegraphy” via inductive and capacitive induction and transmission through the ground, water, and even train tracks from the 1830s[…]

Heinrich Hertz and the Discovery of Radio Waves in 1886

Hertz’s experiments produced and received what are now called radio waves in the very high frequency range. Curated/Reviewed by Matthew A. McIntoshPublic HistorianBrewminate Biography Heinrich Rudolf Hertz was a German physicist who first conclusively proved the existence of the electromagnetic waves predicted by James Clerk Maxwell’s equations of electromagnetism. The unit of frequency, cycle per second, was named the “hertz” in his[…]

“Jitterbugs” and “Crack-pots”: Responses in 1938 to “War of the Worlds”

Of the 1,770 people who wrote to the main CBS station about the broadcast, 1,086 were complimentary. “Good evening, ladies and gentlemen. From the Meridian Room in the Park Plaza in New York City, we bring you the music of Ramon Raquello and his orchestra.” The sounds of “La Cumparsita” began to fill the airwaves.[…]