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In 1917, Einstein published an article in Physkalische Zeitschrift that proposed the possibility of stimulated emission, the physical technique that makes possible both the laser and the nuclear warhead.
Einstein became increasingly isolated in his research, and his attempts were ultimately unsuccessful. In his pursuit of a unification o
f the fundamental forces he ignored the mainstream development of physics (and vice versa), most notably the discovery of the strong and weak nuclear forces, which were not well understood until many years after Einstein's death.
In 1939 Leo Szilárd and Einstein wrote a letter to U.S. President Franklin Delano Roosevelt urging the study of nuclear fission for military applications, warning that the Third Reich might well be developing nuclear weapons based on their own research. Roosevelt formed a committee to investigate the matter and granted Enrico Fermi's University of Chicago neutron experiments $6,000, first steps to the Manhattan Project
Several biographers have called him the “true” inventor of television, although there remains healthy dispute about this designation.
Philo Taylor Farnsworth (August 19, 1906 – March 11, 1971) was an American inventor best known for being the first person to demonstrate and patent a working electronic television system, a system which still serves as the basis for the current cathode ray tube television devices.
The video camera tube developed from a combination of the work of Farnsworth and Zworykin