Niels Bohr (1885–1962) was a Danish physicist who created the Bohr
model, the first widely accepted model of atomic structure. A central
figure of 20th-century physics, he received the Nobel prize in 1922. In
three articles published in 1913, the third in November, he applied old
quantum theory to restrict the revolving electrons to stable orbits,
creating the Bohr model of the atom. A dozen years later, faced with the
opposing particle and wave interpretations of atomic phenomena in the
new quantum mechanics, he proposed the complementarity principle of
using both interpretations to fully explain the results. He founded the
Institute of Theoretical Physics in Copenhagen, now known as the Niels
Bohr Institute, and predicted the existence of a new element, which was
named hafnium after the Latin name for Copenhagen. Later, the element
bohrium was named after him. During the 1930s, he helped refugees from
Nazism. In September 1943, after receiving word of his impending arrest
by the Germans, he fled to Sweden. Flown next to Britain, he joined the
British Tube Alloys nuclear weapons project, and later the Manhattan
Project. After the war, Bohr was involved with the establishment of
CERN.
Read more: <https://en.wikipedia.org/wiki/Niels_Bohr>
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Today's selected anniversaries:
936:
Shi Jingtang was enthroned as the first emperor of the Later Jin
Dynasty by Emperor Taizong of Liao, following a revolt against Emperor
Fei of Later Tang.
<https://en.wikipedia.org/wiki/Shi_Jingtang>
1443:
Rebelling against the Ottoman Empire, Skanderbeg and his forces
liberated Kruja in Middle Albania and raised the Albanian flag.
<https://en.wikipedia.org/wiki/Skanderbeg>
1925:
The country music radio program Grand Ole Opry was first
broadcast on WSM radio in Nashville, Tennessee.
<https://en.wikipedia.org/wiki/Grand_Ole_Opry>
1971:
Prime Minister of Jordan Wasfi al-Tal was assassinated by the
Black September unit of the Palestine Liberation Organization in Cairo.
<https://en.wikipedia.org/wiki/Wasfi_al-Tal>
1990:
After being elected as leader of the British Conservative Party
one day earlier, John Major officially succeeded Margaret Thatcher as
Prime Minister of the United Kingdom.
<https://en.wikipedia.org/wiki/John_Major>
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Wiktionary's word of the day:
tractator:
1. (historical) In medieval commerce, the person who handles or transports
merchandise on behalf of an investor.
2. A person who writes tracts.
<https://en.wiktionary.org/wiki/tractator>
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Wikiquote quote of the day:
If the brain were so simple we could understand it, we would be
so simple we couldn't.
--David Zindell
<https://en.wikiquote.org/wiki/David_Zindell>