 From 1921, he conducted several aether drift experiments, repetitions of the Michelson-Morley experiment and the Trouton–Noble experiment, whose negative outcome further supported Albert Einstein's special relativity – although Tomaschek was a critic of that theory.In November 1926, Tomaschek went to the "Technische Hochschule München" (today, the "Technische Universität München") and then to the "Philipps-Universität Marburg", where he was appointed "ausserordentlicher Professor" (extraordinarius professor) for experimental physics, in late 1927.From 1934, Tomaschek was the director of the physics department at the "Technische Hochschule Dresden" (today, the "Technische Universität Dresden").