My first blog

1. Famous Scientists andFamous Scientists and
their contributionstheir contributions
Shara Markose

2. 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.

3. Niels BohrNiels Bohr
1885-1962
Known for the
Bohr model of the
atom
◦ Electrons travel
around nucleus in
restricted orbits
Won Nobel prize
in physics in 1922

4. Born in Copenhagen in 1885
Researched structure of the atom
First to postulate that electrons travel
around nucleus of atom
Predicted splitting of uranium atoms
Gave lectures, never “boring”

5. Albert EinsteinAlbert Einstein
1879-1955
Postulated photons
travel in discreet
energy packets
(individual photons)
Theories of special
and general relativity
Nobel prize in
physics, 1921

6. Born in Württemberg, Germany, 1879
Postulated light travels in individual
photons, 1905
Wrote special theory of relativity 1905
Wrote general theory of relativity 1916
E = mc2

7. Henri BecquerelHenri Becquerel
1852-1908
Known for his
discovery of
natural radiation
in uranium
Shared Nobel
Prize with the
Curies in 1903

8. Born 1852 in Paris
Discovered natural radiation in uranium
in 1896
Unit of radiation named after
1 disintigration/second = 1 Bq
“Oh Henry!”

9. Enrico FermiEnrico Fermi
1901-1954
Discovered
neutrino and
neutron activation
Work led to
fission and
controlled nuclear
reaction
Nobel prize
physics, 1938

10. Born in Rome, 1901
Contributed to early theory of beta
decay and neutrino
Demonstrated nuclear transformation
with neutrons in elements
Led experiment that performed first
controlled nuclear reaction
Very “fair to me”

11. Sir Ernest RutherfordSir Ernest Rutherford
1871-1937
Discovered alpha
and beta particles
Discovered
nucleus in 1910
Won Nobel prize
in chemistry,
1908

12. Born in Nelson, New Zealand, 1871
Discovered alpha and beta particles in
1898
Devised method of counting alpha
particles with H Geiger
Investigations of alpha scattering in
1910 led to the discovery of the nucleus
Knighted in 1914

13. Marie CurieMarie Curie
1867-1934
Known 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)

14. Born in Warsaw, 1867
Discovered radium and polonium and
developed means to separate it
Refused to patent work for money
Developed unit of radioactivity
◦ 1 Ci = 37,000,000,000 disintigrations/sec
There was no “cure” for her radiation

15. ConclusionConclusion
The 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.

16. Thank youThank you