Enrico Fermi A Modern Renaissance Man Enrico Fermi, Physicist Early Years Physics in Italy Scuola Normale Superiore di Pisa

Enrico Fermi A Modern Renaissance Man Enrico Fermi, Physicist Early Years Physics in Italy Scuola Normale Superiore di Pisa www.phwiki.com

Enrico Fermi A Modern Renaissance Man Enrico Fermi, Physicist Early Years Physics in Italy Scuola Normale Superiore di Pisa

Gray, John, Freelance Columnist has reference to this Academic Journal, PHwiki organized this Journal Enrico Fermi A Modern Renaissance Man Alej in addition to ro Garcia Dept. Physics, SJSU Enrico Fermi, Physicist Fermi was one of the greatest physicists of the 20th century. He is best known as long as his leading contributions in the Manhattan Project but his work spanned every field of physics. Early Years In 1901, Enrico was born in Rome to Alberto Fermi, a Chief Inspector of the Ministry of Communications, in addition to Ida de Gattis, an elementary school teacher. As a young boy he enjoyed learning physics in addition to mathematics in addition to shared his interests with his older brother, Giulio. When Giulio died unexpectedly of a throat abscess in 1915 it brought great sorrow to the family in addition to Enrico escaped into his studies.

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Physics in Italy Despite being the birthplace of physics, in the 20th century Italy had slipped behind the other European countries. That all changed with Enrico Fermi. Scuola Normale Superiore di Pisa Urged by a family friend, Fermi went to Pisa as long as his university studies. His exceptional abilities were recognized by his professors, some of whom received lessons on relativity theory from the young Fermi. Fermi Electron Theory While in Pisa, Fermi in addition to his friends had a well-earned reputation as pranksters. One afternoon, while patiently trapping geckos (used to scare girls at the university), Fermi came up with the fundamental theory as long as electrons in solids. Fermi’s theory later became the foundation of the entire semiconductor industry.

Professor Fermi Thanks to the ef as long as ts of Professor ( in addition to Senator) Orso Mario Corbino, who recognized his talent, Fermi returned to Rome as professor of physics in 1924. Fermi was only 24 years old but was already an internationally known scientist. Via Panisperna Boys In Rome, Fermi (with Corbino’s help) gathered the brightest scientific minds in Italy in his theoretical physics group, known as the “Via Panisperna Boys.” Despite that fact that Enrico was only a few years older, his students (half-jokingly) called him “The Pope” because they considered him infallible. Ettore Majorana Fermi considered his Sicilian student, Ettore Majorana, to be far more brilliant than himself. Majorana’s main fault was that problems were so simple as long as him to solve that he rarely bothered to write down in addition to publish his calculations. Majorana became full professor of theoretical physics in Naples University in 1937 without needing to take examination “ as long as high in addition to well-deserved repute, independently of the competition rules.” A few months afterwards, at the age of 31, Majorana mysteriously disappeared during a boat trip from Palermo to Naples.

Emilio Segrè Born in Tivoli, Segrè enrolled in the University of Rome La Sapienza as an engineering student. He switched to physics in 1927 to work with Fermi. Emilio Segrè, Clyde Wieg in addition to , in addition to Owen Chamberlain examining film measuring the rate of antiproton travel, 1955 While Segrè was visiting Berkeley in 1938, Mussolini’s Fascist government passed anti-Semitic laws barring Jews from university positions, making Segrè an émigré. Segrè in addition to Owen Chamberlain (also Fermi’s student) shared the Nobel Prize as long as their discovery of the anti-proton in 1959. Fermi, Sportsman An avid hiker in addition to tennis player, Fermi showed the same intensity in his sports as in his science. Often he would win his matches by simply outlasting his opponent. Yet Fermi was also known as long as his modesty in addition to would never make much of his achievement. Fermi Problems Fermi was famous as long as being able to avoid long, tedious calculations or difficult experimental measurements by devising ingenious ways of finding approximate answers. He also enjoyed challenging his friends with “Fermi Problems” that could be solved by such “back of the envelope” estimates. Laura in addition to Enrico Fermi

Fermi Problem Example “What is the length of the equator” Fermi problems are solved by assembling simple facts that combine to give the answer: The distance from Los Angeles to New York is about 3000 miles. These cities are three time zones apart. So each time zone is about 1000 miles wide. There are 24 time zones around the world. So the length of the equator must be about 24,000 miles The exact answer is 24,901 miles. From Theory to Experiment In 1934, Fermi learned of the nuclear experiments of Frédéric in addition to Irène Joliot-Curie, he immediately shifted his group’s work from theory to experiment. Nobel Prize In 1938, Fermi won the Nobel Prize in Physics as long as “demonstrations of the existence of new radioactive elements produced by neutron irradiation, in addition to as long as his related discovery of nuclear reactions brought about by slow neutrons”.

Emigration to America After receiving the Nobel prize in Stockholm, Fermi in addition to his family emigrated to New York, mainly because of the fascist regime’s anti-Semitic laws, threatened his wife Laura, who was of Jewish descent. World War In 1939, Nazi Germany invaded Pol in addition to , igniting World War II. The United States, initially neutral, was drawn in after Pearl Harbor is attacked in December 1941. Einstein’s Letter to Roosevelt On August 2nd 1939, encouraged by a group of fellow physicists, the world’s most famous scientist, Albert Einstein, writes a historic letter to President Roosevelt.

Nuclear Fission The bombardment of uranium by neutrons was first studied by Enrico Fermi but the results were not fully understood at the time. After Fermi’s publication, Lise Meitner, Otto Hahn in addition to Fritz Strassmann began per as long as ming similar experiments in Germany. In 1939, they discovered that the uranium nucleus split (fission) under neutron bombardment, releasing nuclear energy.

Chain Reaction Nuclear chain reactions had been as long as eseen as early as 1933 by Leo Szilard, although Szilard at that time had no idea with what materials the process might be initiated. Fermi in addition to Szilard proposed the idea of a nuclear reactor (pile) with natural uranium as fuel in addition to graphite as moderator of neutron energy. Chicago Pile-1 Fermi led the construction of Chicago Pile-1 (CP-1) , the world’s first nuclear reactor. Due to a construction labor strike, he built it inside a squash court at the University of Chicago. The first artificial, self-sustaining, nuclear chain reaction was initiated within CP-1, on Dec. 2, 1942. Manhattan Project CP-1 demonstrated that nuclear energy was not just a theoretical possibility but an experimental fact. At that point, enormous resources were poured into the Manhattan Project in an ef as long as t to produce the atomic bomb, a decisive weapon to end the war.

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Nuclear Physics in Nazi Germany The Nazi reactor ef as long as t had been severely h in addition to icapped by the German physicists belief that heavy water was necessary as a neutron moderator. The Germans were short of heavy water because of Allied ef as long as ts to prevent Germany from obtaining it in addition to they never stumbled on the secret of using purified graphite instead. Nazi German experimental nuclear pile at Haigerloch Post-War Work In his later years, Fermi did important work in particle physics, especially related to pions in addition to muons. He was also known to be an inspiring teacher at the University of Chicago. His lecture notes were transcribed into books in addition to are still used today. Fermi’s Last Years Fermi died at age 53 of stomach cancer; two of his assistants working on or near the nuclear pile also died of cancer. Fermi in addition to his team knew that their work carried considerable risk but they considered the outcome so vital that they as long as ged ahead with little regard as long as their own personal safety.

Fermilab Fermi National Accelerator Laboratory (Fermilab), located in Batavia near Chicago, is a Department of Energy national laboratory specializing in high-energy particle physics. Fermilab’s Tevatron particle accelerator, four miles in circumference, is the world’s highest energy particle accelerator. The Fermi Paradox The extreme age of the universe in addition to its vast number of stars suggest that if the Earth is typical, extraterrestrial life should be common. Discussing this proposition with colleagues over lunch in 1950, Fermi asked: “Where is everybody” We still don’t have a good answer to Enrico’s question.

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