Louis-Victor Pierre Raymond de Broglie, 7. duc de Broglie, (August 15, 1892 - March 19, 1987) was a French physicist and a Nobel laureate in the year 1929 who created a new field in physics, the wave mechanics. In his later career, de Broglie worked to develop a causal explanation of wave mechanics, in opposition to the wholly probabilistic models which dominate quantum mechanical theory. The svg-file based on photo from wikicommon. Author is unknown. For more information: http://en.wikipedia.org/wiki/Louis_de_Broglie