Heinrich Hertz and the Discovery of Radio Waves in 1886 – Brewminate: A Bold Blend of News and Ideas
What are Radio Waves? | Examples, Uses & Spectrum - Video & Lesson Transcript | Study.com
History of radio - Wikipedia
IEEE - James Clerk Maxwell first predicted that radio waves existed in the 1860s. His theory is called “Maxwell's Equations” and described radio and light waves to be electromagnetic waves that were
National Radio Day – The Evolution of Radio
Radio History and Communications Elements - ppt video online download