Henryk Niewodniczański (10.12.1900-20.12.1968) was a Polish experimental physicist and a member of the Polish Academy of Sciences (1951). He was born in Vilnius. He graduated from Vilnius University (1924), where he worked in 1932-34 and 1939-44 (in 1934—35 he worked at the Cavendish Laboratory); in 1937 —39 he was professor at the University of Poznań and director of the Institute of Experimental Physics at the university. In 1945 he was professor at the Universities of Lublin and Wrocław, and in 1946— 68 at the University of Kraków and director of the Institute of Physics at the university (in 1955 —68 he was also director of the Institute of Nuclear Physics in Kraków — Bronowice).
His research was in low-energy nuclear physics and atomic spectroscopy. He proved experimentally (1934) the existence of magnetic dipole radiation.