Albert Einstein

A longtime pacifist and a Jew, Einstein became the target of hostility in Weimar Germany, where many citizens were suffering plummeting economic fortunes in the aftermath of defeat in the Great War. In December 1932, a month before Adolf Hitler became chancellor of Germany, Einstein made the decision to emigrate to the United States, where he took a position at the newly founded Institute for Advanced Study in Princeton, New Jersey. He would never again enter the country of his birth.

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Albert Einstein was a German-born physicist who developed the theory of relativity. He is considered the most influential physicist of the 20th century.

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Einstein attended elementary school at the Luitpold Gymnasium in Munich. He enjoyed classical music and played the violin. However, he felt alienated and struggled with the rigid Prussian education he received there. He also experienced a speech difficulty, a slow cadence in his speaking where he'd pause to consider what to say next. In later years, Einstein would write about two events that had a marked effect on his childhood. One was an encounter with a compass at age five, where he marveled at the invisible forces that turned the needle. The other was at age 12, when he discovered a book of geometry which he read over and over.

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Born on March 14, 1879 in Ulm, Württemberg, Germany, Albert Einstein grew up in a secular, middle-class Jewish family. His father, Hermann Einstein, was a salesman and engineer who, with his brother, founded Elektrotechnische Fabrik J. Einstein & Cie, a company that manufactured electrical equipment in Munich, Germany. His mother, the former Pauline Koch, ran the family household. Einstein had one sister, Maja, born two years after him.

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Fortunately, Einstein was able to apply directly to the Eidgenössische Polytechnische Schule (Swiss Federal Polytechnic School) in Zürich, Switzerland. Lacking the equivalent of a high school diploma, he failed much of the entrance exam but got exceptional marks in mathematics and physics. Because of this, he was admitted to the school provided he complete his formal schooling first. He went to a special high school run by Jost Winteler in Aarau, Switzerland, and graduated in 1896 at age 17. He became lifelong friends with the Winteler family, with whom he had been boarding, and fell in love with Wintelers' daughter, Marie. At this time, Einstein renounced his German citizenship to avoid military service and enrolled at the Zurich school.

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In 1889, the Einstein family invited a poor Polish medical student, Max Talmud to come to their house for Thursday evening meals. Talmud became an informal tutor to young Albert, introducing him to higher mathematics and philosophy. One of the books Talmud shared with Albert was a children's science book in which the author imagined riding alongside electricity that was traveling inside a telegraph wire. Einstein began to wonder what a light beam would look like if you could run alongside it at the same speed. If light were a wave, then the light beam should appear stationary, like a frozen wave. Yet, in reality, the light beam is moving. This paradox led him to write his first "scientific paper" at age 16, "The Investigation of the State of Aether in Magnetic Fields." This question of the relative speed to the stationary observer and the observer moving with the light was a question that would dominate his thinking for the next 10 years.

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In 1894, Hermann Einstein's company failed to get an important contract to electrify the city of Munich and he was forced to move his family to Milan, Italy. Albert was left at a relative's boarding house in Munich to finish his education at the Luitpold Gymnasium. Faced with military duty when he turned of age, Albert allegedly withdrew from school, using a doctor's note to excuse himself and claim nervous exhaustion, making his way to Milan to join his parents. His parents sympathized with his feelings, but were concerned about the enormous problems that he would face as a school dropout and draft dodger with no employable skills.

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Born on March 14, 1879, in the southern German city of Ulm, Albert Einstein grew up in a middle-class Jewish family in Munich. As a child, Einstein became fascinated by music (he played the violin), mathematics and science. He dropped out of school in 1894 and moved to Switzerland, where he resumed his schooling and later gained admission to the Swiss Federal Polytechnic Institute in Zurich. In 1896, he renounced his German citizenship, and remained officially stateless before becoming a Swiss citizen in 1901.

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By the time Einstein's wife Elsa died in 1936, he had been involved for more than a decade with his efforts to find a unified field theory, which would incorporate all the laws of the universe, and those of physics, into a single framework. In the process, Einstein became increasingly isolated from many of his colleagues, who were focused mainly on the quantum theory and its implications, rather than on relativity.

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Einstein continued working at the patent office until 1909, when he finally found a full-time academic post at the University of Zurich. In 1913, he arrived at the University of Berlin, where he was made director of the Kaiser Wilhelm Institute for Physics. The move coincided with the beginning of Einstein's romantic relationship with a cousin of his, Elsa Lowenthal, whom he would eventually marry after divorcing Mileva. In 1915, Einstein published the general theory of relativity, which he considered his masterwork. This theory found that gravity, as well as motion, can affect time and space. According to Einstein's equivalence principle-which held that gravity's pull in one direction is equivalent to an acceleration of speed in the opposite direction-if light is bent by acceleration, it must also be bent by gravity. In 1919, two expeditions sent to perform experiments during a solar eclipse found that light rays from distant stars were deflected or bent by the gravity of the sun in just the way Einstein had predicted.

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In the late 1930s, Einstein's theories, including his equation E=mc2, helped form the basis of the development of the atomic bomb. In 1939, at the urging of the Hungarian physicist Leo Szilard, Einstein wrote to President Franklin D. Roosevelt advising him to approve funding for the development of uranium before Germany could gain the upper hand. Einstein, who became a U.S. citizen in 1940 but retained his Swiss citizenship, was never asked to participate in the resulting Manhattan Project, as the U.S. government suspected his socialist and pacifist views. In 1952, Einstein declined an offer extended by David Ben-Gurion, Israel's premier, to become president of Israel.

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In the third and most famous article, titled "On the Electrodynamics of Moving Bodies," Einstein confronted the apparent contradiction between two principal theories of physics: Isaac Newton's concepts of absolute space and time and James Clerk Maxwell's idea that the speed of light was a constant. To do this, Einstein introduced his special theory of relativity, which held that the laws of physics are the same even for objects moving in different inertial frames (i.e. at constant speeds relative to each other), and that the speed of light is a constant in all inertial frames. A fourth paper concerned the fundamental relationship between mass and energy, concepts viewed previously as completely separate. Einstein's famous equation E = mc2 (where "c" was the constant speed of light) expressed this relationship.

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The German-born physicist Albert Einstein developed the first of his groundbreaking theories while working as a clerk in the Swiss patent office in Bern. After making his name with four scientific articles published in 1905, he went on to win worldwide fame for his general theory of relativity and a Nobel Prize in 1921 for his explanation of the phenomenon known as the photoelectric effect. An outspoken pacifist who was publicly identified with the Zionist movement, Einstein emigrated from Germany to the United States when the Nazis took power before World War II. He lived and worked in Princeton, New Jersey, for the remainder of his life.

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The general theory of relativity was the first major theory of gravity since Newton's, more than 250 years before, and the results made a tremendous splash worldwide, with the London Times proclaiming a "Revolution in Science" and a "New Theory of the Universe." Einstein began touring the world, speaking in front of crowds of thousands in the United States, Britain, France and Japan. In 1921, he won the Nobel Prize for his work on the photoelectric effect, as his work on relativity remained controversial at the time. Einstein soon began building on his theories to form a new science of cosmology, which held that the universe was dynamic instead of static, and was capable of expanding and contracting.

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Throughout the last years of his life, Einstein continued his quest for a unified field theory. Though he published an article on the theory in Scientific American in 1950, it remained unfinished when he died, of an aortic aneurysm, five years later. In the decades following his death, Einstein's reputation and stature in the world of physics only grew, as physicists began to unravel the mystery of the so-called "strong force" (the missing piece of his unified field theory) and space satellites further verified the principles of his cosmology.

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While working at the patent office, Einstein did some of the most creative work of his life, producing no fewer than four groundbreaking articles in 1905 alone. In the first paper, he applied the quantum theory (developed by German physicist Max Planck) to light in order to explain the phenomenon known as the photoelectric effect, by which a material will emit electrically charged particles when hit by light. The second article contained Einstein's experimental proof of the existence of atoms, which he got by analyzing the phenomenon of Brownian motion, in which tiny particles were suspended in water.

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