1909 Nobelist for contributions to the invention of radio Crossword Clue

 The answer to the crossword clue "1909 Nobelist for contributions to the invention of radio" is GUGLIELMO MARCONI. He was an Italian physicist and inventor who is credited with developing the first practical wireless telegraph. He shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun for their work on wireless telegraphy.

Marconi was born in Bologna, Italy, in 1874. He began experimenting with wireless telegraphy in the early 1890s. In 1895, he sent the first wireless signal across a distance of several kilometers. In 1896, he transmitted a wireless signal across the English Channel.

Marconi's work made it possible for people to communicate over long distances without wires. This had a profound impact on the world, allowing for the development of new technologies such as the radio, television, and radar.

Marconi was a prolific inventor and also held patents for a number of other inventions, including a device for detecting radio waves and a system for sending Morse code over radio waves. He was knighted by King Edward VII in 1901 and died in Rome in 1937.