Gabriel Gabrielsen Holtsmark

Gabriel Gabrielsen Holtsmark (1 February 1867 – 20 July 1954) was a Norwegian educator, physicist and actuary.

He was born in Asker as a son of farmer and mayor Bent Holtsmark and his wife Anne Elisabeth Gabrielsen.

From 1901 to 1902 he spent time at the University of Würzburg, studying under Wilhelm Wien.

In 1902 Holtsmark delivered his doctoral thesis,[1] which bore the name Eine Methode für die Intensitätsmessung von Röntgenstrahlen nebst einer Berechnung der Wellenlänge derselben.

[3] He returned to Norway the same year, and was hired at the Norwegian College of Agriculture.