* Born: October 15, 1848, in Reichenbach an der Fils, Germany
* Died: December 16, 1916, in Halle (Saale), Germany
* Known for:
* Discovery of Radon: Dorn is best known for his discovery of radon, a radioactive noble gas, in 1900. He observed that radium emitted a new radioactive gas, which he initially called "radium emanation."
* Work on radioactivity: He conducted extensive research on radioactivity, including studies on the radioactive properties of radium, thorium, and uranium.
* Academic career: Dorn was a professor of physics at the University of Halle from 1895 until his death.
* Legacy: His discovery of radon paved the way for further research in nuclear physics and had significant implications for our understanding of radioactivity and the structure of matter.
If you have any more specific questions about Dorn or his work, feel free to ask!