Thomas Young
(1773-1829)
is a British
Physicist, the founder
of light
wave theory.
Young was
born in Milverton, Somerset,
England in
June 13, 1773 and died
in London
May 10, 1829, at the age of 56.
Young
attended a college in Edinburg
University
then he went to Germany
and got
degree from Gottingen University
at 23 years
old. As a student,
he found out
that the shape
of the eye
lenses are changed they
become thin
or convex,
according to
the distance of the object seen.
In 1801,
Young conducted an experiment known
Later as
Young Experiment.
From this
experiment,
Young
discovered the law
of light
interference.
With his
discovery, he
succeeded in
proving that light is a wave.
In 1793 he
managed to explain the process of accommodation
of the human eye.
He said that
the lens of the eye changes shape,
according to the distance the object he saw.
In 1801 he
discovered the cause of that state astimagtisma
eye that causes blurred objects
seen.
It is caused by abnormal eye arch. In the same year he
discovered the law
of interference of light.
With the discovery he proved that light is a wave.
In
addition, Young assumed that a substance has a tension limit.
The properties of
this strain is called "Young's modulus" of a substance.
Interferometer
is a device used for measuring wavelengths
or wavelength changes with very high
accuracy
by determining the lines of interference (Halliday, p. 715, 1994).
Previous experiments have been done by
Thomas Young who designed a method to
produce an interference pattern.
Thomas uses a single beam of light
(monochromatic)
and the narrow gap to the two narrow slits radiating or
parallel and closely spaced,
young cracks can be used to determine the
interference pattern.
After that A.Michelson experiment with the design and the
same
principle as belonging to Young's double slit experiment form,
first
experiment Michelson interferometer is used to prove the existence of the
ether,
but not proven, finally Michelson interferometer is used
to determine
the wavelength of light, and to determine the
distance very short and to
observe the optical properties of the
medium of light wave interference
initially demonstrated by Thomas Young in 1801.
in Young explained that the
diffraction experiments are symptoms
experienced by the spread of a beam
direction of light waves through
a narrow gap when compared to the size of the
wavelength.
If the beam is diffracted wave passes through two narrow slits that
when two or more waves that meet or chime in the fields of space will be
added
to each other by following the principle of superposition.
By using the same
source of waves (the same light source) and
the wavelength is known as well, it
can be determined very short
distance along the optical properties of the
medium will be easily observed.
Another theory proposed by Thomas Young
(British scientist in 1801),
said humans can see color because in the retina of
the
human eye there are three color receptors, each sensitive to red, green,
and blue.
He said that the colors red and blue are the primary colors of light.
When the eye catching color, the eyes of the captured information is sent to
the brain,
the brain then processes it so that people can receive information
such as the sensation of color.
The theory
is then processed again by Hemholtz,
which is then combined with the theory of
Young and Young-HEMOLTZ theory,
which is a blend of theory with the theory of
Young Hemoltz.
In this theory he added that from a combination of primary
colors appear as
complementary colors warn ever proven by Sir Isaac Newton.