Konstanty Zakrzewski (14 January 1876 in Warsaw – 19 January 1948 in Kraków) was a Polish physicist. He was a professor of the Jagiellonian University (1911–1913 and since 1917) and professor of the Lviv University (1913–1917), member of the Polish Academy of Learning (since 1920). Zakrzewski was a researcher of electron theory of metals, optics, and dielectric properties of substances. He was an initiator of cosmic ray research in Poland (1947).
References "Zakrzewski Konstanty". Internetowa encyklopedia PWN (in Polish). Archived from the original on 7 June 2011. Retrieved 10 September 2007. "Zakrzewski Konstanty". WIEM Encyclopedia (in Polish). Archived from the original on 6 June 2011. Retrieved 10 September 2007.