Both winners ( Max Theodor Felix von Laue , 1914. Karl Manne Georg Siegbahn, 1925) Furthered the technological field of xray.
Ok, well i went with that because they won the prize in 1925 but it was reserved and awarded in 1926. I would have to go with the fact that they were all german then.
ok, i thought it was a trick question thats y i put karl siegbahn in at 1925. James Franck & Gustav Ludwig Hertz won in 1925 ( awarded in 1926) all three were german. Like i said, there is alot i do not know about physics :P.