 From 1919 to 1925, Bühl studied physics at the "Friedrich-Wilhelms-Universität" (today, the "Humboldt-Universität zu Berlin") and the "Ruprecht-Karls-Universität Heidelberg".He received his doctorate in 1925 under the Nobel Laureate Philipp Lenard at Heidelberg and was a teaching assistant to Lenard.In 1928, Bühl became a teaching assistant at the "Albert-Ludwigs-Universität Freiburg" and from 1929 was a Privatdozent there in physics.