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HEISENBERG, Werner (1901-1976):
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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HEISENBERG, Werner (1901-1976):

German physicist who developed the principle of indeterminacy and worked on the QUANTUM THEORY. His principle, known as the "Heisenberg" or Uncertainty Principle, says that at the sub-atomic level one cannot know both the speed and position of a particle.