1887
Apr 11
| 1887 • Heinrich Hertz discovers the photoelectric effect on the production and reception of electromagnetic (EM) waves (radio). This was an important step towards the understanding of the quantum nature of light. |
1915
Oct 6
Age: 28y
|
marriageMargaret Elizabeth Fitzpatrick Seattle, King, Washington, USA ⇓ 1 Source ⇓ |
about
Age: 31y
1919
Age: 31y
|
birth of childJohn Bagnall Jr. 2 Sources ⇓ |
| 1919 • Estonian War of Independence: The Soviet Red Army meets resistance from Estonian forces. |
1920
Age: 32y
| 1920 • Soviet–Lithuanian Peace Treaty: The Russian Soviet Federative Socialist Republic recognizes independent Lithuania. |
1956
Mar 12
Age: 68y
| 1956 • The 28th Academy Awards ceremony is held. |