Chief of Army General Staff
Appointed Chief of Army General Staff for France
Permanent historical records · Updated 2026-11-03
1930 in Belgium
Explore 6 historical events and records for Belgium in 1930.
Historical records for Belgium in 1930
Sorted by month and day. Records with no month are shown last. Showing 6 of 6 unique records.
6Unique records
1 of 1Page
6Named events on this page
4Named people on this page
2Places on this page
Other events (month unknown)
Constellation Boundaries
Publishes definitive boundaries for the eighty-eight modern constellations.
Escaping Photon Used to Challenge Energy-Time Uncertainty
Einstein argued that measuring the mass loss of a timed photon box could in principle determine both the photon's energy and its emission time more precisely than quantum uncertainty allowed.
International Astronomical Boundaries
Standardizes celestial mapping for the International Astronomical Union.
Photon Box Thought Experiment Presented
At the Solvay Conference Einstein proposed a box-and-clock thought experiment intended to challenge the energy-time uncertainty relation by weighing a box before and after a photon escaped.
Rex Party
Founds the Rex Party, Belgian fascist party
How these records were prepared
Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.