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his return to Europe he was the guest of the British statesman and philosopher Viscount Haldane in
London, where he met several renowned scientific, intellectual and political figures, and delivered a
lecture at King’s College London.
In 1922, his travels took him to Asia and later to Palestine, as part of a six-month excursion and
speaking tour, as he visited Singapore, Ceylon and Japan, where he gave a series of lectures to
thousands of Japanese. After his first public lecture, he met the emperor and empress at the
Imperial Palace, where thousands came to watch. In a letter to his sons, Einstein described his
impression of the Japanese as being modest, intelligent, considerate, and having a true feel for art.
In 1917, Einstein applied the general theory of relativity to the structure of the universe as a whole.
He discovered that the general field equations predicted a universe that was dynamic, either
contracting or expanding. As observational evidence for a dynamic universe was not known at the
time, Einstein introduced a new term, the cosmological constant, to the field equations, in order to
allow the theory to predict a static universe. The modified field equations predicted a static universe
of closed curvature, in accordance with Einstein’s understanding of Mach’s principle in these years.
This model became known as the Einstein World or Einstein’s static universe.
Einstein was displeased with quantum theory and quantum mechanics (a theory he had helped
create), despite its acceptance by other physicists, stating that God “is not playing at dice.” Einstein
continued to maintain his disbelief in the theory, and attempted unsuccessfully to disprove it until he
died at the age of 76.
Einstein played a key role (1939) in the construction of the atomic bomb by signing a famous letter to
President Franklin D. Roosevelt (1882–1945). It said that the Germans had made scientific
advances and that it was possible that Adolf Hitler (1889–1945, the German leader whose actions
led to World War II (1939–45)), might become the first to have atomic weapons. This led to an all-out
U.S. effort to construct such a bomb. Einstein was deeply shocked and saddened when his famous
equation E=mc 2 was finally demonstrated in the most awesome and terrifying way by using the
bomb to destroy Hiroshima, Japan, in 1945. For a long time he could only utter “Horrible, horrible.”
Personal Life
Albert Einstein was born in Ulm, in the Kingdom of Württemberg in the German Empire, on 14 March
1879. His parents were Hermann Einstein, a salesman and engineer, and Pauline Koch. In 1880, the
family moved to Munich, where Einstein’s father and his uncle Jakob founded Elektrotechnische
Fabrik J. Einstein & Cie, a company that manufactured electrical equipment based on direct current.
While attending school in Zurich, Einstein developed lasting friendships and alliances, also meeting
his future wife, Mileva Maric, a Serbian physics student.
(Einstein with his 1st wife Mileva Maric)