What nationality was the man who determined that light has a finite speed?
Ole Rømer Ole Christensen Rømer (] ; 25 September 1644 – 19 September 1710) was a Danish astronomer who in 1676 made the first quantitative measurements of the speed of light.
Gustav Herglotz Gustav Herglotz (2 February 1881 – 22 March 1953) was a German Bohemian mathematician. He is best known for his works on the theory of relativity and seismology.