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Max Planck, full name Max Karl Ernst Ludwig Planck, is a German theoretical physicist and the founder of quantum theory, which won him the Nobel Prize in Physics in 1918.
Planck made many discoveries in theoretical physics, but his quantum theory revolutionized our understanding of atomic and subatomic processes, just as Albert Einstein's theory of relativity revolutionized our understanding of space and time. Together they represent the fundamental theories of 20th-century physics. They forced humanity to reconsider some philosophical beliefs and began to be applied to industry, including the military, affecting all aspects of modern human life.
Planck was one of the first scientists to realize the importance of Einstein's special theory of relativity, and his influence played a crucial role in its acceptance in Germany. As dean of the University of Berlin, he personally visited Einstein in Zurich in 1913 to persuade him to move to Berlin, which became his base for the next 20 years. Einstein's 1905 work on the photoelectric effect (for which he was awarded the Nobel Prize) is based on Planck's constant (h), the fundamental unit of quantum theory.
