The discovery of radio waves, which was widely seen as confirmation of James Clerk Maxwell's electromagnetic theory and paved the way for numerous advances in communication technology, was made by German physicist Heinrich Hertz. In the...

Karl Jansky discovered extraterrestrial radio waves while investigating possible sources of interference in shortwave radio communications across the Atlantic for Bell Laboratories, and is often known as the father of radio astronomy....

This site from MedicineNet.com gives an MRI description, why they're performed, risks, and patient preparation. A thorough explanation of the process is provided.

Nikola Tesla and Thomas Edison duke it out over the best way to transmit electricity and Heinrich Hertz is the first person (unbeknownst to him) to broadcast and receive radio waves.

For a man whose career involved the entire known universe, John Kraus had a remarkably insular upbringing. He was born and raised in Ann Arbor, Michigan, and earned his bachelor's, master's and doctoral degrees in physics, all at the...

This Florida State University page introduces light as an electromagnetic wave and discusses the frequency and wavelength range of the various regions of the electromagnetic spectrum. Includes links to some interactive Java applets.

A solid summary from the University of Oregon of the work of James Maxwell Clerk, Michael Faraday, and others in the field of electric and magnetic phenomena. This is a fine essay.