There he took Max Abraham 's course on the electromagnetic theory of light and also attended courses by Stark, Walther Nernst, Schwarzschild and Zermelo .
Doon siya kinuha Max Abraham 's kurso sa electromagnetic theory ng ilaw at nag-aral din ng mga kurso sa pamamagitan ng lubos, Walther Nernst, Schwarzschild at Zermelo.