Ferdinand Braun (1850–1918) was a German physicist who made significant contributions to the development of wireless telegraphy. He invented the Braun tube, a precursor to the cathode ray tube, vital for early television technology. Braun's work on radio transmission and reception led to the co-invention of the first practical wireless telegraphy system with Guglielmo Marconi. His research on crystal diodes laid the groundwork for semiconductor electronics. In 1909, he was awarded the Nobel Prize in Physics for his contributions to wireless telegraphy. Braun's innovations profoundly influenced telecommunications and laid the foundation for modern electronics. Learn More: