the role of the ionosphere in radio communication

1860: The existence of radio waves predicted. 1866: Demonstrated that rapid variations of electric current could be projected into space. Nov 1, 2012 ... Furthermore, contrary to what you might have read, the U.S. Supreme Court never said that he was -- not in 1943, not in any other year. If fact, ... Nov 27, 2015 ... I'm not sure when pit-to-car radios were first implemented in F1. There's an article here that claims Colin Chapman experimented with pilot headsets. Work began in earnest in the spring of 1954, and this first Regency transistor radio was in stores for the Christmas season later that year. The Regency ... Tesla actually invented the idea of radio in 1892 — not too long after Heinrich Hertz demonstrated UHF spark wireless transmissions in Germany in 1885. In 1898, ... Nov 2, 2021 ... The invention of the two-way radio changed communications dramatically. When people could communicate back and forth in real time using one ... Jan 21, 2016 ... In 1906, Canadian inventor Reginald Fessenden sent the faint sound of his voice and violin by radio. The next year, Lee de Forest invented ... It was invented in 1947, and even several years later, it was considered by ... radio equipment. Yet the transistor is fundamental for all modern ... Jul 26, 2023 ... Let's take a closer look at radio advertising history and how audio ads have advanced over the years, from the very first radio commercial to ... The start of radio broadcasting in the United States is generally traced to 1910, when a program was produced from the Metropolitan Opera House in New York City ...