great scientists
TRANSCRIPT
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Famous Scientists and Famous Scientists and their contributionstheir contributions
Shara Markose
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INTRODUCTIONINTRODUCTION•Scientist, in a broad sense, is a
person engaging in a systematic activity to acquire knowledge.
•So many people in this world have changed the way we live and think,
with their inventions and work. Here is a list of some of the famous
scientists in history, and a brief about them.
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Niels BohrNiels Bohr
1885-1962Known for the
Bohr model of the atom ◦Electrons travel
around nucleus in restricted orbits
Won Nobel prize in physics in 1922
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Born in Copenhagen in 1885Researched structure of the atomFirst to postulate that electrons travel
around nucleus of atomPredicted splitting of uranium atomsGave lectures, never “boring”
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Albert Einstein Albert Einstein
1879-1955Postulated photons
travel in discreet energy packets (individual photons)
Theories of special and general relativity
Nobel prize in physics, 1921
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Born in Württemberg, Germany, 1879Postulated light travels in individual
photons, 1905Wrote special theory of relativity 1905Wrote general theory of relativity 1916E = mc2
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Henri Becquerel Henri Becquerel
1852-1908Known for his
discovery of natural radiation in uranium
Shared Nobel Prize with the Curies in 1903
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Born 1852 in ParisDiscovered natural radiation in uranium
in 1896Unit of radiation named after1 disintigration/second = 1 Bq“Oh Henry!”
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Enrico FermiEnrico Fermi1901-1954Discovered
neutrino and neutron activation
Work led to fission and controlled nuclear reaction
Nobel prize physics, 1938
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Born in Rome, 1901Contributed to early theory of beta
decay and neutrinoDemonstrated nuclear transformation
with neutrons in elementsLed experiment that performed first
controlled nuclear reactionVery “fair to me”
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Sir Ernest Rutherford Sir Ernest Rutherford
1871-1937Discovered alpha
and beta particlesDiscovered
nucleus in 1910Won Nobel prize
in chemistry, 1908
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Born in Nelson, New Zealand, 1871Discovered alpha and beta particles in
1898Devised method of counting alpha
particles with H GeigerInvestigations of alpha scattering in
1910 led to the discovery of the nucleusKnighted in 1914
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Marie Curie Marie Curie
1867-1934Known for her
discovering and separating radium and polonium
Shared Nobel prize in physics, 1903 and full prize in chemistry, 1911 ◦ (First to receive two
prizes)
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Born in Warsaw, 1867Discovered radium and polonium and
developed means to separate itRefused to patent work for moneyDeveloped unit of radioactivity
◦1 Ci = 37,000,000,000 disintigrations/secThere was no “cure” for her radiation
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ConclusionConclusionThe world will always be indebted to these
great individuals, who with their outstanding work, contributed to mankind in a way that will never be forgotten. The list of famous scientists in history could go on and on, because there are so many other great
scientists that are worth a mention, but the ones mentioned above are by far those who cannot be compared with anyone else. Their work and contribution to this world is simply
unique.
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Thank youThank you