Science-Scientist

Name: Khoo Zhan An
Form: 4 Red
Subject:Science
Topic:Scientist

Scientist: Albert Einstein

Biography Born March 14, 1879, Ulm, Bararia,

Germany

German-born physicist who
developed the special and general
theories of relativity

In 1902, he began to service in the
Confederal Office of Interllectual
Property inBern

Biography In 1905, he published works on
quantum theory of light, Brownian
movement and the theory of relativity

His theories about light were
confirmed in 1919, The Times
presented him as the new Newton

In 1922 he was awarded the Nobel
Prize in Physics

Biography He emigrated to the
United States

The last 25 years of his
life were spent at
Princeton University

Discoveries

•EMPIRICAL EVIDENCE FOR THE ATOMIC
THEORY

•RIDDLE OF THE PHOTOELECTRIC EFFECT
•THE GENERAL THEORY OF RELATIVITY

Discoveries

•DETERMINATION OF AVOGADRO’S
NUMBER

•THE CONCEPT OF REST ENERGY THROUGH
HIS FAMOUS EQUATION

•THE SPECIAL THEORY OF RELATIVITY

EMPIRICAL EVIDENCE FOR THE ATOMIC THEORY

• published a paper on this random motion of particles in a fluid, known
as Brownian motion

• explained in precise detail how the motion that Brown had observed
was a result of the pollen being moved by individual water molecules.

RIDDLE OF THE PHOTOELECTRIC EFFECT

• the emissions of electrons from a metal when light shines on it.
Scientists were puzzled with this effect as it couldn’t be explained with
Maxwell’s wave theory of light.

THE GENERAL THEORY OF RELATIVITY

• The inconsistencies of Newtonian mechanics with Maxwell’s equations
of electromagnetism led Einstein to write his legendary paper ‘On the
Electrodynamics of Moving Bodies‘ which was published on
September 26, 1905.

DETERMINATION OF AVOGADRO’S NUMBER

•Einstein’s statistical discussion of atomic behavior gave experimentalists a way to
count atoms by looking through an ordinary microscope.

THE CONCEPT OF REST ENERGY THROUGH HIS FAMOUS EQUATION

•Albert Einstein predicted the equivalence of mass (m) and energy (E) through his
famous mass–energy equivalence formula E=mc2, where c is the speed of light in
vacuum.

•This was of paramount importance because it showed that a particle possesses an
energy called the “rest energy”, distinct from its classical kinetic and potential
energies.

THE SPECIAL THEORY OF RELATIVITY

•Einstein proposed major changes to mechanics while handling situations close to the
speed of light.

•It was supported by confirmatory experimental evidence and soon gained
widespread acceptance.

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