He was awarded his Doctor of Philosophy in 1935 at Uppsala University for his research led by Manne Siegbahn on the measurement of wavelengths in the elements X-ray spectrum.
[1] von Friesen moved to the newly established Nobel Institute for Physics in Stockholm in 1937 along Siegbahn.
[1] von Friesen became a professor at the Department of Physics at Lund University in 1948, and held the post until his retirement in 1972 when was succeeded by Hans Ryde.
As a professor he continued his research on nuclear physics, and he was in charge when Lund University received its first particle accelerator.
[3] For a wider public, he became known through his participation in the TV program Fråga Lund in the 1960s and 1970s, where he was one of six scientists in the Panel who answered questions from the audience.