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.
Pierre-Gilles de Gennes Pierre-Gilles de Gennes (] ; October 24, 1932 – May 18, 2007) was a French physicist and the Nobel Prize laureate in physics in 1991.