Georg Joos

He wrote Lehrbuch der theoretischen Physik, first published in 1932 and one of the most influential theoretical physics textbooks of the 20th Century.

In the late 1920s, at the industrial firm Zeiss Jena, he reproduced the Michelson–Morley experiment with more refined equipment and confirmed the original results.

[3] In 1933, shortly after Adolf Hitler became Chancellor, the Law for the Restoration of the Professional Civil Service was passed, which resulted in resignations and emigrations of many Jewish physicists, one of them was James Franck, who was director of the Second Physics Institute at the University of Göttingen.

In 1935, an ordinance related to the Civil Services act, the Law on the Retirement and Transfer of Professors as a Result of the Reorganization of the German System of Higher Education, was used to forcibly transfer Joos to Göttingen to fill Frank's position as ordinarius professor and director of the Second Physics Institute.

Meitner and her nephew, Otto Robert Frisch, correctly interpreted the data and coined the term fission.

In April 1939, Joos, after hearing a paper by Wilhelm Hanle, conveyed to the Reichserziehungsministerium the implications of Hahn's experiment and the potential military applications of uranium research.

As early as 1925, Joos wrote in a letter to Sommerfeld that the Carl Zeiss company would build an apparatus for a Michelson-Morley experiment on the Jungfrau Joch.

It is the experiment with the highest accuracy to date, which denies the existence of an ether wind and thus supports Albert Einstein's special theory of relativity.