Planck Plaque
![](https://ozonedepletiontheory.info/wp-content/uploads/2021/04/Planck-plaque-1.jpg)
Plaque at the Humboldt University of Berlin : “Max Planck, discoverer of the elementary quantum of action h, taught in this building from 1889 to 1928” (Wikipedia). h is the Planck constant.
Plaque at the Humboldt University of Berlin : “Max Planck, discoverer of the elementary quantum of action h, taught in this building from 1889 to 1928” (Wikipedia). h is the Planck constant.