Max Planck -

He served as president of the Kaiser Wilhelm Society (1930–1937), which was renamed the Max Planck Society in 1948.

Planck initially viewed his quantum hypothesis as a mathematical trick rather than a physical reality, only accepting its revolutionary implications years later. Max Planck

While attempting to solve the "ultraviolet catastrophe" (the failure of classical physics to predict black-body radiation at high frequencies), Planck proposed that energy oscillators in a cavity could only change energy in discrete increments ( ), not continuously. Planck’s Constant ( He served as president of the Kaiser Wilhelm

): He introduced this fundamental constant of nature, which has a value of approximately , to define the relationship between energy and frequency. Planck’s Constant ( ): He introduced this fundamental

Despite his immense success, his personal life was filled with tragedy, including the loss of his first wife, three children, and the execution of his son by the Nazis for participating in the 1944 plot to assassinate Hitler.