# Max Planck

> German theoretical physicist (1858–1947)

**Wikidata**: [Q9021](https://www.wikidata.org/wiki/Q9021)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Max_Planck)  
**Source**: https://4ort.xyz/entity/max-planck

## Summary
Max Planck was a German theoretical physicist renowned for his foundational role in quantum theory, which revolutionized the understanding of atomic and subatomic processes. Born in 1858, Planck is best known for introducing the quantum hypothesis, for which he received the Nobel Prize in Physics in 1918. His work laid the groundwork for modern physics, profoundly influencing subsequent scientific developments.

## Biography
- **Born:** April 23, 1858, in Kiel, German Empire
- **Nationality:** German
- **Education:** Studied physics at the University of Munich and the University of Berlin
- **Known for:** Originating quantum theory, Planck's law, and Planck units
- **Employer(s):** University of Munich, University of Berlin, Kaiser Wilhelm Society (now Max Planck Society)
- **Field(s):** Theoretical physics, quantum mechanics, thermodynamics

## Contributions
- **Planck's Law (1900):** Described the spectral density of electromagnetic radiation emitted by a black body in thermal equilibrium, introducing the quantum hypothesis that energy is emitted in discrete quanta.
- **Quantum Theory Foundation:** Planck's work challenged classical physics, marking the birth of quantum mechanics and earning him the 1918 Nobel Prize in Physics.
- **Planck Units (1899):** Developed a set of units based on fundamental physical constants, providing a natural system for measurement in physics.
- **Leadership in German Science:** Served as president of the Kaiser Wilhelm Society (1911–1930), later renamed the Max Planck Society, shaping Germany's scientific research landscape.

## FAQs
### Q: What is Max Planck's most significant contribution to science?
A: Planck's formulation of quantum theory, introducing the idea that energy is quantized, revolutionized physics and earned him the 1918 Nobel Prize.

### Q: Where did Max Planck conduct his most influential work?
A: Planck worked primarily at the University of Berlin, where he developed his quantum theory, and later led the Kaiser Wilhelm Society.

### Q: What awards did Max Planck receive?
A: Planck received the Nobel Prize in Physics (1918), the Copley Medal (1918), the Lorentz Medal (1928), and the Max Planck Medal (1929), among others.

### Q: How did Max Planck influence later scientists?
A: Planck's quantum theory directly inspired Albert Einstein, Niels Bohr, and Erwin Schrödinger, shaping the development of modern quantum mechanics and physics.

## Why They Matter
Max Planck's introduction of quantum theory fundamentally altered the trajectory of physics, resolving the ultraviolet catastrophe and explaining black-body radiation. His work bridged classical and modern physics, enabling advancements in atomic and subatomic studies. Without Planck's quantum hypothesis, technologies like semiconductors, lasers, and quantum computing would not exist. His leadership in German scientific institutions also solidified Germany's role as a hub for theoretical physics research.

## Notable For
- **Nobel Prize in Physics (1918):** Awarded for his discovery of energy quanta.
- **Founder of Quantum Theory:** His 1900 paper marked the birth of quantum mechanics.
- **Planck Units:** A system of natural units derived from fundamental constants.
- **Max Planck Society:** The premier German research organization named in his honor.
- **Influence on Modern Physics:** Directly inspired Einstein, Bohr, and other pioneers of quantum theory.

## Body
### Early Life and Education
Max Karl Ernst Ludwig Planck was born on April 23, 1858, in Kiel, German Empire, to Johann Planck and Emma Patzig. He studied physics at the University of Munich and the University of Berlin, graduating in 1880. Planck's early work focused on thermodynamics, where he formulated the second law of thermodynamics.

### Career and Quantum Theory
In 1900, while at the University of Berlin, Planck introduced the quantum hypothesis to explain black-body radiation, proposing that energy is emitted in discrete units (quanta). This work, published as Planck's law, earned him the 1918 Nobel Prize in Physics. Planck's quantum theory laid the foundation for quantum mechanics, influencing Einstein's photon theory and Bohr's atomic model.

### Leadership and Legacy
Planck led the Kaiser Wilhelm Society from 1911 to 1930, fostering German scientific research. Despite personal tragedies, including the loss of his home in World War II, Planck remained a central figure in physics. The Max Planck Society, established in 1948, honors his legacy, supporting cutting-edge research in his name.

### Honors and Recognition
Planck received numerous accolades, including the Copley Medal (1918), the Lorentz Medal (1928), and the Max Planck Medal (1929). His contributions extend beyond physics, with Planck units serving as a universal measurement system in cosmology and theoretical physics.

### Death and Posthumous Impact
Planck died on October 4, 1947, in Göttingen, Germany. His quantum theory remains a cornerstone of modern physics, underpinning technologies from semiconductors to quantum computing. Planck's emphasis on fundamental constants and theoretical rigor continues to guide scientific inquiry worldwide.

## References

1. Integrated Authority File
2. www.accademiadellescienze.it
3. Geni.com
4. BnF authorities
5. WikiTree
6. [Source](https://www.uni-kiel.de/ueberblick/planck/planck14.shtml)
7. Czech National Authority Database
8. The Fine Art Archive
9. Find a Grave
10. [The Nobel Prize in Physics 1918. Nobel Foundation](http://www.nobelprize.org/nobel_prizes/physics/laureates/1918/index.html)
11. [Source](https://www.nobelprize.org/nobel_prizes/about/amounts/)
12. [Award winners : Copley Medal. Royal Society](https://docs.google.com/spreadsheets/d/1dsunM9ukGLgaW3HdG9cvJ_QKd7pWjGI0qi_fCb1ROD4/pubhtml?gid=1336391689&single=true)
13. [Source](https://en.gdch.de/gdch/prizes-and-awards/gdch-awards/liebig-commemorative-medal.html)
14. [Source](https://www.scientificlib.com/en/Physics/Info/GuthrieMedalAndPrize.html)
15. Complete List of Royal Society Fellows 1660-2007
16. Mathematics Genealogy Project
17. International Standard Name Identifier
18. CiNii Research
19. Virtual International Authority File
20. MusicBrainz
21. www.pas.va
22. Q137170397
23. NNDB
24. [Source](https://kalliope-verbund.info/DE-611-BF-114557)
25. MacTutor History of Mathematics archive
26. Encyclopædia Britannica Online
27. Babelio
28. filmportal.de
29. KNAW Past Members
30. Brockhaus Enzyklopädie
31. Gran Enciclopèdia Catalana
32. GeneaStar
33. Frankfurter Personenlexikon
34. Internet Philosophy Ontology project
35. Croatian Encyclopedia
36. Base biographique
37. Munzinger Personen
38. Freebase Data Dumps. 2013
39. [Source](http://digitale.beic.it/primo_library/libweb/action/search.do?fn=search&vid=BEIC&vl%283134987UI0%29=creator&vl%28freeText0%29=Planck%20Max)
40. nobelprize.org
41. CONOR.SI
42. Autoritats UB
43. LIBRIS. 2012
44. Golden
45. Bibliography of the History of the Czech Lands
46. Catalogo of the National Library of India