Maurice de Broglie was the son of Victor, 5th duc de Broglie, and Pauline d'Armaillé, and the elder brother of Louis de Broglie and Pauline de Broglie (later comtesse de Pange) . The de Broglie family was one of the most illustrious noble families in France. In 1901, he married Camille Bernou de Rochetaillée, and had one daughter who died at age six. He inherited the title of 6th duc de Broglie on his father's death in 1906. A graduate of the French naval academy, Maurice de Broglie served nine years in the French Navy. During this time, he became interested in physics and began doing research on electromagnetism. In defiance of his family's wishes, he left the navy to pursue a scientific career. He received his doctorate at the Collège de France in 1908. Maurice de Broglie developed X-ray spectroscopy and made other important advances in X-ray technology. He occasionally collaborated with Louis, who followed his professional lead and became a theoretical physicist; they coauthored a paper in 1921. Maurice de Broglie became a member of the French Academy of Sciences in 1924, and in 1934 was elected to the Académie française. He was also elected to The Royal Society in London.