Max Karl Ernst Ludwig Planck was a German theoretical physicist. Planck made many contributions to theoretical physics, primarily in his role as the originator of quantum theory and one of the founders of modern physics, which revolutionized understanding of atomic and subatomic processes. He is known for the Planck constant, , which is of foundational importance for quantum physics, and which he used to derive a set of units, now called Planck units, expressed in terms of physical constants. The Planck relation, E= ν, states that the energy of a photon is proportional to its frequency.
Biography from Wikipedia, available under CC BY-SA 4.0.
Max Planck in our timeline
Also born on April 23
- William Shakespeare1564 · English playwright and poet
- John Cena1977 · American actor and professional wrestler
- Shirley Temple1928 · American actress and diplomat
- James Buchanan1791 · President of the United States from 1857 to 1861
- Roy Orbison1936 · American singer-songwriter
- Dev Patel1990 · English actor
- Gigi Hadid1995 · American model
- Timothy McVeigh1968 · American domestic terrorist
Also born in 1858
- Theodore Roosevelt1858 · President of the United States from 1901 to 1909
- Giacomo Puccini1858 · Italian opera composer
- Émile Durkheim1858 · French sociologist
- Emmeline Pankhurst1858 · British suffragette
- Rudolf Diesel1858 · German inventor and engineer
- Rudolf, Crown Prince of Austria1858 · Heir to the Austrian throne
- Gustaf V1858 · King of Sweden from 1907 to 1950
- Bonar Law1858 · Prime Minister of the United Kingdom from 1922 to 1923