Péter GnädigPéter Gnädig graduated as a physicist from Eötvös Loránd University (ELTE) in Budapest in 1971 and received his PhD in theoretical particle physics from the same university in 1980. He worked as a researcher in high energy physics and a lecturer in te Department of Atomic Physics at ELTE until he retired in 2010. Between 1985 and 2004, he was one of the leaders of the Hungarian team taking part in the International Physics Olympiad. Since 1989, he has been the physics editor for the Mathematical and Physical Journal for Secondary Schools. He is one of the authors of 200 Puzzling Physics Problems (Cambridge, 2001). Read More Read Less